Having had to change my front discs I have discovered I have a seizing piston , and have been told I need to replace the entire caliper? Is there any other way around this or is the new calipers necessary? Cheers

you could get the caliper/s rebuilt, with ss pistons...

http://biggred.co.uk/

there's prolly a company near you.

others here may be able to advise further. 🙂