I used to subscribe to AP and I must admit that Ivor Matanle's reply looks pretty familiar. Small world...
Anyway, I sneeked a look at the back of an AP in Smiths this Saturday and have come up with http://www.newton-ellis.co.uk/ as hinted at by pentaxuser. I phoned them up and they repair cameras on site so I can pop over to Liverpool and talk to the repairers face to face. I've got four Canon A series cameras that are all getting on a bit now so I think I may be paying them more than one visit.