The London and North Western Railway (LNWR) Prince of Wales Tank Class was a Pacific tank engine version of the Prince of Wales Class 4-6-0 steam locomotive.

History Bowen-Cooke's predecessor George Whale had built 50 related Precursor Tank Class 4-4-2 engines. In terms of familial relationships, Prince of Wales Tank was both a superheated and extended version of the Precursor Tank, and a version of the Prince of Wales Class 4-6-0 steam locomotive with side tanks and a bunker which necessitated an extension to the frames and trailing pony truck. They were used on suburban services out of Euston station and from an early date also used on passenger services between Shrewsbury and Swansea (Victoria) over the steeply-graded Central Wales line, a journey of some .

The LNWR built 47 of the superheated tanks between 1910 and 1916 under Charles Bowen-Cooke.

LMS service All passed onto LMS ownership on the 1923 grouping and were renumbered 6950–6996 with the power classification 4P. Withdrawals started in 1935, their replacements being Class 4 2-6-4T designs by Fowler and Stanier. All were withdrawn and scrapped by 1941.

Fleet list + Table of locomotives LNWRNo. CreweWorksNo. Build date Superheated LMSNo. Withdrawn Notes 2665 4950 6950 2666 4951 6951 2667 4952 from new 6952 2668 4953 from new 6953 2669 4954 from new 6954 2670 4955 from new 6955 217 4956 from new 6956 1183 4957 from new 6957 1366 4958 from new 6958 1797 4959 from new 6959 632 4960 6977 1186 4961 6982 1416 4962 6986 1533 4963 6978 1638 4964 6985 1688 4965 6979 1692 4966 6984 1710 4967 6983 1728 4968 6980 1734 4969 6981 91 5080 from new 6960 375 5081 from new 6961 376 5082 from new 6962 716 5083 from new 6963 915 5084 from new 6964 932 5085 from new 6965 944 5086 from new 6966 962 5087 from new 6970 858 5088 from new 6969 2004 5089 from new 6971 327 5090 from new 6967 704 5091 from new 6968 841 5092 from new 6972 963 5093 from new 6973 1006 5094 from new 6974 1021 5095 from new 6975 1184 5096 from new 6976 96 5347 from new 6987 316 5348 from new 6988 809 5349 from new 6989 878 5350 from new 6990 2098 5351 from new 6991 2273 5352 from new 6992 2292 5353 from new 6993 2298 5354 from new 6994 2384 5355 from new 6995 2418 5356 from new 6996

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