I built this in 1971 it’s a 1951 ariel square four with a nine inch over standard Vellocette front end and front wheel. With a 500×16 rear tyre and a 300×19 front tyre no front mudguard or number plate but still passed an MOT was very easy to ride with no handling problems at all. Still have the bike it bits in my garage.
I have started to put the bits together and hope to get it running again sometime next year