I am having terrible trouble, trying to renew my driving licence on the Gov.uk dvla website I get past all the name, address, driving licence number, part of the form, then it says we can't proceed any further, is there anyway of contacting them apart from phone which takes ages to get through, they are an absolute nightmare.
Just a thought, what site are you using? I see there are several sites other then GOV.UK offering the servcie, if you are on one of those they may not be so reliable.
Why are you renewing early? My photocard expired November and I will wait until I receive notification to renew in around four months, as instructed by DVLA.