J8<Canon/2.8<Canon/1.8<Nikkor/2 in GBP
the Canons and Nikkors have all gone up recently this side of Atlantic.
the 1.8 is the best off axis of these four but if you can get a nikkor cheap id buy.
or both my 1.8s are better off axis but the Nikkors signature is nice
but for the op a Cosina Voightlander LTM 35mm f/2.5 is probably the cheapest modern lenses. A Canon P is well suited to a 35mm.