Help wanted with bike engine identification

[sparkythecat]

I'm not a biker but I've been asked to help sorting some stuff out belonging to an old friend of mine. He had an interest in vintage bikes and was a bit of an inventor.
amongst the stuff I'm trying to identify is this partially dismantled and modified flat twin engine.
Can anyone tell me what it's off please?
[url]

|https://thumbsnap.com/gHjksf8W[/url][url]

|https://thumbsnap.com/FjxuzZ4Z[/url]

[cjb44]

Velocette, 200cc. flat twin.

[Pica-Pica]

cjb44 said:

Velocette, 200cc. flat twin.

As in LE mk2 noddy bike?

[cjb44]

Pica-Pica said:

As in LE mk2 noddy bike?

Yes, or the Valient which was a normal design of bike but still with shaft drive.

[sparkythecat]

Thanks for that chaps. That makes sense as I know he's previously had more than one old Velocette

[Pica-Pica]

In some ways the LE Velocette was ahead of its time. It was laughed at by the Triumph/Norton/BSA boys, but it was horizontally opposed, water-cooled, and shaft-drive. Of course in Police version with leg-shields and panniers it was a bit odd looking.