The Blackpool Gazette gives:
William Jones-Henderson, 81, died from natural causes at his home on Progress Court in Grange Park, Blackpool, on March 7, 2008.
The Electoral Rolls have William J Jones-Henderson living at Flat 7, Dinmore Avenue, Grange Park, Blackpool, Lancashire, FY3 7QX for 18 years.
However, the Death Registers give a William Jones, 81, born 1927, died 27 Mar 2008 in Blackpool, FY3.
So 7th or 27th???
If he was born in December 1926 he should appear on the 1939 War Register. This register asked for dates of birth. It only covers Wales and England. Why did you mention |Scotland? Is there a link there?
Looking at the 1939 War Register there are a couple of possibilities in Caernarfonshire but none with a birth in Dec 1926! Where did you get this date?
1. William John Jones, born 25 Aug 1925, living at Foxhall Cottage (possibly near Llanbedrog?) on the Llŷn peninsula. The date of birth is not clear as it has been altered! It could be 27 Aug 1925??? Most of the information on the sheet has been redacted, so no further clues there.
2. William J Jones, born 16 May 1927. Living on the Llŷn peninsula.
3. William J Jones, born 7 Jul 1925. Living at Bangor.