This is an unusual bike, I'd love to know a bit about it. The frame appears to be home made with possibly a BSA motor. The other bike's an early Hagon with a BSA 250 B31 engine (blue plates).
[/quote]
Firko, the motor is an Ajay or Matchy, BSA magnetos are at the rear of cylinder, the chaincase looks early AJ or Matchy as well as does the rear A frame. i can't figure the frame and front forks out,a good bit of backyard home brew , eh ?
And, yes the other is a Hagon, an early Grasstracker ( seat tube goes between engine and gearbox, unlike the Sandracer) with a 21 inch front wheel.
Just had a closer look at the Hagon,it may be a copy. It appears to have Bantam forks and steering head, similar to the 350 Ariel slider I built that Jim now has
Foss