Why would anyone pay £315 for a haircut (presumably a wash, cut and dry)? Would it really look that much better than done by someone charging a quarter of that? You wake up next day and the style is probably gone (well, it definitely would be on me). I really balk at paying anything over £50/£60 for my very straight hair and only get it done for special occasions, when I get them to give it volume and loose waves. If it's just a regular cut/trim, I can't justify those sorts of prices. Oh well, each to their own - I do actually think people should spend their money on what they like. I am just tight.
I'd love a good peripatetic hairdresser charging reasonable prices, like yours.