Its in my blood

[fazersharp]

Just googled norton model 50 and it doesn't look like that, the 50 has a slightly angled rear shock but my picture shows almost upright shocks, also the norton seems to have a panel section on the tank like a knee grip section, also the tank in my picture looks higher and slopes down sharply whereas the norton is flatter, and the headlight mount looks different.
It would be really interesting to find out what the bike was.