It would seem that I am not the only one feeling a bit peeved with the DVLA. This quote (from April 2021) throws a little light on the matter:
'The Driver and Vehicle Licensing Agency (DVLA) has confirmed to HonestJohn.co.uk that some drivers who are applying to renew their driving licence as they turn 70 will not be able to apply online. This leaves a postal application as the only option, with the DVLA saying it will take approximately six weeks to receive the new licence back.' [Click Link for Full Article]
I still can't see why my on-line application was rejected, I supplied the required data and I have a current passport. The passport ran consecutively from my old passport so the required 'digital signature' should still be on file!
Oh well, I shall just have to wait. I wonder if my new/renewed licence will turn up before my birthday in February?
John