you could also consider Minox 35 mm; or Rollei 35 mm. Very pocketabe; with inbuilt meter and a separate small flash attachment. ( scale focusing though). Solid built, especially the Rollei. The Xenar lens is even better; and definitely bel;ow 100£ for a very good specimen.
Rollei 35 SLR with a 50 mm lens is under 100£, but I am told the body may developn a problem. The lens is Zeiss glass though, so thats big plus. .
A contaz III ( pre war RF) would be around 120£. No reliable meter though.
another option is to buy a 42mm screw mount SLR body at around 50£; and then add Takumar prime lens. A 50 mm Tak, or a Scneider could be had at below 50£; and the lens quality is comparable( some say) to Zeiss. Certainly the Taks are no slouch.
Or the Yaschica 35 RF series ( electro 35 etc) with Yashinon l;ens are absolutely fantastic with a small priuce tag ( usually below 50£)
So much to choose, so little money.....