I spoke with a very nice young man in Swansea Pensions Service a couple of days ago. No wonder I'd had no reply. Gareth said they had received no letter from me. He was very helpful though and has forwarded a request to the NI Contributions section so that I can be sent details on how I can improve my pension.
I was hoping to organise a small party by arranging for friends to join me at one of the local pubs for a 'pensioner's lunch'. But as my spouse has been unwell I am reluctant to commit to festivities. Failing that I will take a short trip on the local bus - for free.