The 1918 Grand National was cancelled because Aintree Racecourse had been taken over by the War Office. However, a substitute race known as the War Steeplechase was held at Gatwick Racecourse. The Gatwick races held from 1916 to 1918 are typically omitted from the true Grand National records.
The race was won by Poethlyn, ridden by jockey Ernest Piggott and trained by Harry Escott.
Finishing order PositionNameJockeyAgeHandicap (st-lb)SPDistance01PoethlynErnest Piggott811-602Captain DreyfusJohn Reardon?12-703BallymacadIvor Anthony?11-304BernerayGeorge Avila?10-4?Top HoleCharles Hawkins?11-2?Clear MoneyMr Pepper511-2?Shaun SpadahA Stubbs710-11?Queen ImaalAlfred Newey?10-7?Sergeant MurphySpink Walkington810-7?Mark BackHerbert Smyth?10-7?ChangO J Casebourne810-2?Simon The LepperRoger 'Tiny' Burford?10-0?AwbegL Jones?10-0?CharlburyJoe Dillon109-10
Non-finishers FenceNameJockeyAgeHandicap (st-lb)SPFate?Ally SloperJohn Walsh911-9Fell?WavertreeEdmund Driscoll810-12Fell?VermouthJack Anthony811-13
The Grand National 1839-1930 by David Hoadley Munroe
References
http://www.grand-national.net/gatwick.htm