I remember going to where Dick Melton used to make/remake Spitfires,and had the Walrus,near Micheldever/Bullington;I`m also sure ,like Zetec ,there was a tyre company nearby,as I think I bought some m/cycle racing Dunlop triangulars at the same time,possibly `85/`86.
However,can`t make G-E match.
The Walrus was last see 4-5 yrs ago at the other location...