Ni 1922, Bamford & Martin ṣe awọn ọkọ ayọkẹlẹ lati dije ni Grand Prix Faranse, eyiti o tẹsiwaju lati ṣeto awọn igbasilẹ iyara ati agbara agbaye ni Brooklands. Awọn ọkọ ayọkẹlẹ ẹgbẹ mẹta pẹlu awọn ọkọ ayọkẹlẹ meji meji 16-valve ni a kọ fun ere-ije ati fifọ igbasilẹ: nọmba chassis 1914, nigbamii ni idagbasoke bi Green Pea; nọmba chassis 1915, ọkọ ayọkẹlẹ igbasilẹ Razor Blade; ati nọmba chassis 1916, nigbamii ni idagbasoke bi Halford Special. O fẹrẹ to awọn ọkọ ayọkẹlẹ 55 ni a kọ fun tita ni awọn iṣeto meji; chassis gigun ati chassis kukuru. Bamford & Martin lọ si ifowopamọ patapata ni ọdun 1924 ati pe a ra nipasẹ Dorothea Charnwood, ẹniti o fi ọmọ rẹ John Renwood Martin sinu iṣowo. Renford & Martin gba lati ṣeto awọn igbasilẹ iyara ati agbara agbaye ni Brooklands. "Awọn ọkọ ayọkẹlẹ ẹgbẹ mẹta pẹlu awọn ọkọ ayọkẹlẹ meji meji-valve ni a kọ fun ere-ije ati fifọ igbasilẹ: nọmba chassis 1914, nigbamii ni idagbasoke bi Green Pea; nọmba chassis 1915, ọkọ ayọkẹlẹ igbasilẹ
Àkọsílẹ̀ Enfield-Allday