Sixty-five pound for a new lens would be a crappy cheap four-element job. Witha a bit of luck, you can pick up a secondhand six-element lens for less money. If you get really stuck I can e-mail you links to an ebay site with cheap-and-cheerful, and reliable, ex-soviet gear where you can find a reasonable lens (certainly not great though) for about twenty quid or less. Also look in local secondhand websites, or a find a camera-fair. Unfortunately, here in Holland, a lot of darkroom gear ends up as landfill so the UK is probably the same . . .