Hi Leica007,
I don't know who you use for photo development in Oxford, but I would highly recommend you speak to Paul Sims of Colourbox Techunique - he's a gent, and will handle all your requirements at not-extortionate prices. The only problem is, as as a result he tends to be very busy! Contact details here:
Colourbox Techunique - Address, Contact, Information, Map & Directions - Local Brit
If you speak to him, tell him I (Robert Hodnett) recommended you to him!
Best regards,
Rob