The County of London Electric Supply Company Limited (C.L.E.S.Co) was a British electricity undertaking. It was incorporated as a public company in 1891 to generate and supply electricity to parts of south west London and two parishes adjacent to the City of London. It owned and operated power stations at Wandsworth and City Road. From 1925 it cooperated with three other London companies, with the intention of centralising electricity generation in the new, high thermal efficiency, power station at Barking. The company was abolished in March 1948 upon the nationalisation of the British electricity supply industry.
Background The County of London Electric Lighting Company Limited was registered on 30 June 1891, to supply electricity to areas of north, south and south west London. The company was granted provisional orders to supply electricity as follows:
1892 – (St Luke and Clerkenwell); 1892 – Wandsworth Electric Lighting Order 1892 (district of Wandsworth Board of Works, plus the parishes of Putney, Wandsworth, Tooting Graveney, Streatham and Clapham); 1895 – (St Olave Southwark); 1896 – (Camberwell); 1897 – (Holborn (east part)); 1897 – (Mile End Old Town, St George’s in the East, and Limehouse District Board of Works); 1898 – .
The company changed its name to the County of London and Brush Provincial Electric Lighting Company Limited in 1893. By 1903 it was called the County of London Electric Supply Company Limited.
Operations
Management The company had five chairmen between 1896 and 1948:
Lord Rathmore Joseph Bevan Braithwaite Sir Harry Renwick Sir Bernard E. Greenwell Sir Robert Renwick
The company management board in 1922 was composed of:
Sir Harry Renwick (Chairman and Managing Director) Lord Gainford Sir Bernard E. Greenwell Sir Frederick Hall J. A. Hosker R. Percy Sellon
The company’s registered address was Moorgate Court, Moorgate Place, London EC2.
Power stations The company initially built two power stations, one at City Road and one in Wandsworth.
City Road power station The City Road power station was located on the City Road basin on the Regent's Canal (51°31'48"N 0°05'50"W). Construction commenced in 1895 but owing to strikes of builders’ workmen it was not completed until early 1897 and supply commenced in September 1897. The initial plant installed was capable of supplying 80,000 8-candle-power lamps.
By 1900 there 12 Babcock & Wilcox boilers supplying
6 x 200-kW two-phase, 50 Hz Electric Construction Company alternators
5 x 150 kW Brush compound engines coupled directly to Mordey 100 Hz single phase alternators
2 x 550 kW British Thomson - Houston DC generators of 550-KW driven by E P Allis engines. The mixed system of voltages was as a result of the progressive addition of new districts with those further away being supplied with bi phase before being transformed down.
In 1906 a British Thomson-Houston Co 1,500 kW turbine was added.
In 1923 the plant at the City Road power station comprised:
Boilers: 168,100 lb/h (21.2 kg/s), which provided steam to: Generators: 2 × 1,500 kW turbo-alternators, alternating current, 1 × 2,500 kW turbo-alternator, alternating current, 1 × 5,500 kW turbo-alternator, alternating current, 1 × 525 kW reciprocating engine, direct current, 2 × 600 kW reciprocating engine, direct current
These machines had a total generating capacity of 10,500 kW of AC and 1,725 kW of DC.
The electricity available to customers was:
2-phase AC 50 Hz 104 Volts DC 530 Volts City Road power station was not a 'selected station' under the Central Electricity Board's 1926 scheme, as a consequence the Company decommissioned it in 1929.
Wandsworth power station
The plant at Wandsworth power station used coal-fired boilers and Brush Universal machines coupled directly to Mordey dynamos. The plant was capable of supplying 40,000 8-candle-power lamps. In addition to the power stations, work included the laying of cables in St Luke, Clerkenwell, Wandsworth, Putney, Streatham, Clapham, Holborn and Camberwell. These were supplied at 6,000 Volts through stepup / stepdown transformers located at Wandsworth and remote substations.
In 1906 a British Thomson-Houston Co 1,500 kW turbine was added.
By 1923 the plant comprised:
Coal-fired boilers generating up to 322,400 lb/h (40.62 kg/s) of steam which was supplied to: Generators: 1 × 1,000 kW reciprocating engine, 3 × 1,500 kW steam turbo-alternators, 2 × 5,000 kW steam turbo-alternators, 2 × 6,000 kW steam turbo-alternators.
These machines had a total generating capacity of 27,500 kW of alternating current.
The electricity available to customers was:
2-phase AC 50 Hz 205 and 404 Volts 3-phase AC 50 Hz 205 and 404 Volts DC 410 Volts Wandsworth power station was operational until 1964.
Electricity supply The business of the company increased to meet the rising demand for electricity. The following table summarises the growth of the company in terms of capacity of the plant, the electricity load, the amount of current sold, and the number of customers. +County of London Electric Supply Company operating data, 1897–1946YearCapacity of plant, kWMax load, kWElectricity sold, MWhNo. of customersConnected load, kWLoad factor, per cent1897 (City Road)3331897 (Wandsworth)11719049,2505,3425,7555,22212.319078,70013,97030,035190810,00013,61113,64519099,85014,786191220,30012,80022,51220,24644,76320.0191325,74322,315191428,01224,212191530,56225,913191635,02926,994191737,59527,998191840,32628,400191934,00025,70042,48831,39082,22418.9192138,00027,90049,55343,00087,90227.3192238,00029,80051,22091,55026.1192339,72537,65065,67954,000119,24125.71931509,8291932604,5991933412,901250,100693,374163,982492,26938.31934776,0941935885,4031936412,500319,9511,034,605268,769828,46240.719371,914,9531946 (Wandsworth)19,16021,2281946 (Barking)418,2002,077,998
Electricity use Electricity was originally used for lighting but ‘power’ uses were soon established. The following table illustrates the quantities and changing patterns of use. +End use of electricity, 1919–1936, MWhUse, MWhYear19191921192219231936Public lighting992761961124,960Domestic supply38,24314,02613,17715,748200,338Power and heat29,67031,56234,750194,561Traction4,14600066,912Bulk supply5,5806,2857,633567,837Total42,48849,55351,22058,2421,034,606
Financial statistics The capital required to establish, build and operate the business was raised through the offer of shares. Capital expenditure was needed for the purchase of land, buildings, machinery, mains, transformers, meters, electrical instruments, legal costs, fixtures and furniture at the stations. The capital expenditure in 1896 and 1897, associated with the commissioning of the power stations at City Road and Wandsworth, amounted to: +Capital expenditure, 1896–97Year18961897City Road£155,596£214,257Wandsworth£117,126£196,543 Profits were made through the sale of electricity which provided an income for the company and its shareholders. An example of the sums involved is shown in the table. +Sales revenue, working cost and profit, 1897–1923YearRevenue from electricity salesWorking cost of generationExcess of revenue over expenditure1897 (City Road)£7,141£4,176£2,9651897 (Wandsworth)£3,328£2,047£1,2811912£216,665£87,954£117,1451919£543,284£301,603£235,1741922£723,226£402,817£340,4281923£835,348£358,122£502,9371936£3,602,230£2,421,204£1,181,026
Shareholders dividends were paid throughout the operational life of the company. Dividends expressed as a percentage of the total capital raised in a given year were as shown, together with the average dividends paid by the London company electricity undertakings. +County of London Company shareholder dividends 1895-1919 Year1895189618971898189919001901190219031904190519061907Dividend %00.591.111.463.104.484.774.834.754.694.985.005.00Average dividend %4.014.665.545.105.154.605.295.555.515.795.655.405.14Year190819091910191119121913191419151916191719181919Dividend %5.055.115.055.285.345.575.645.635.635.635.826.00Average dividend %5.125.075.075.115.185.335.104.874.685.324.965.76
Expansion The company expanded its operations, particularly in East London and into south Essex and Kent.
By 1913 the County of London Company was supplying the metropolitan boroughs of Bermondsey, Camberwell, Finsbury, Holborn, Lambeth, Southwark and Wandsworth; the urban districts of Merton and Morden, Romford, and Tilbury; and the rural districts of Croydon, Orsett and Tilbury.
To meet the requirements of the expanded supply area, capital expenditure on new plant and equipment was required, as shown on the table below. +Capital expenditure, 1907–1919.Year190719081909191019111912Capital expenditure£50,926£84,215£64,667£71,135£62,897£95,723Year191419151916191719181919Capital expenditure£167,680£78,848£53,022£63,616£88,398£149,116 Electricity supplies to further areas continued. By 1937 the company was supplying electricity additionally to: the metropolitan boroughs of Barking, Beddington and Wallington, Dagenham, Mitcham, Reigate, Sutton and Cheam and Wimbledon; the urban districts of Banstead, Billericay, Brentwood, Carshalton, Caterham and Warlingham, Hornchurch, Thurrock, Wanstead and Woodford; and the rural districts of Epping, and Godstone.
The company supplied users such as the South Metropolitan Electric Tramways and Lighting Company (from 1916, supplying 2,021.0 MWh in 1919); the South London Electric Supply Corporation (from 1917, supplying 5,340.4 MWh in 1923).
Between 1918 and 1936 the company acquired 14 other electricity companies. It was able to consolidate development over a large area of south east England through its Kent Power Company subsidiary.
In 1920, the County of London Electric Supply Company applied for permission to build a power station at Creekmouth in Barking capable of expansion to 600 MW. To finance the construction the company issued shares, there were offers in 1921 and 1922. The 1922 offer consisted of 500,000 six per cent cumulative preference shares and 500,000 ordinary shares. Barking A station was built, and was commissioned in 1925.
The County of London Company and three others in south and east London promoted the London Electricity (No. 1) Act 1925 (15 & 16 Geo. 5. c. lxii). The four companies were: the City of London Electric Lighting Company; the County of London Electric Supply Company Limited; the South London Electric Supply Corporation Limited; and the South Metropolitan Electric Light and Power Company Limited. They established a joint committee to specify how generating stations of each company were operated. The companies remained district electricity supply undertakings; although they were physically joined with interconnecting cables. The companies envisaged that power stations such as Barking would provide enough capacity for their electricity requirements. The act required equal consideration for the interests of shareholders and consumers. Dividends to shareholders were limited to 7 percent per year and the funds that could be carried forward in the accounts were restricted. Profits above these conditions formed a ‘consumers’ benefit’ in the form of lower prices.
The company built Barking B power station which was commissioned in 1933.
Government policy Under the terms of the Electricity (Supply) Act 1926 (16 & 17 Geo. 5. c. 51) the Central Electricity Board (CEB) was established. The CEB identified high efficiency ‘selected’ power stations that would supply electricity most effectively. The CEB also constructed the national grid (1927–33) to connect power stations within a region.
City Road power station was not a selected station, as a consequence the company decommissioned it in 1929.