Frame for singlespeed build

Me and my friend are going to build a singlespeed MB; any recommendations on which frame to use, quite open to steel or ally and size isn’t important at the moment.
Looking to spend around £450-650

Any help would be great

James

You’ll get a lot of frame for that money; at £650, you’re most of the way to buying a Jones frame/fork.

If i were buying a frame for that money, i’d look at a Swift or a Stooge.

That said, i’ve just built an Inbred, which is lovely.

dialled love/hate. Steel frame ss specific. You should be able to build up the complete bike for £650.

I’d say Stooge (but I’m biased).

Both frames look awesome, was also thinking about charge frames

OR…

£550 fully built