Would find it difficult seeing the ATL Austin Gipsy (aka Austin-built Jeep) being built in the UK during and after WW2 and doubt fiberglass would be an option.
It was both cost constraints and time pressures which prevented the MGB from being fitted with independent rear suspension (with a better capitalized BMC via pre-merger wanks of both Austin and Morris likely to help matters), though MG seriously wanted to utilize all-independent suspension on their sportscars as was the case with the EX234 and ADO21 projects who both used Hydrolastic suspension.
It was both cost constraints and time pressures which prevented the MGB from being fitted with independent rear suspension (with a better capitalized BMC via pre-merger wanks of both Austin and Morris likely to help matters), though MG seriously wanted to utilize all-independent suspension on their sportscars as was the case with the EX234 and ADO21 projects who both used Hydrolastic suspension.