Hello and thank you to everyone for all your help.
I wanted to let you know that after nearly 30 years of searching (with a good few years barking up the wrong tree) I have solved the mystery of who my ancestor Samuel King was.
With the paper trail going cold, I decided to look at the DNA evidence and see if that could help.
I have clustered all my King matches and did a search in the family who had an ancestor with the name King in their tree.
One came up whose grandfather was Harry Charles King (1897-1962) and so I started to research this person and their ancestry.
Tracing the line back myself from scratch I got back to a Thomas King of Weston (1775-1843).
He is in the 1841 census there aged 65 and beneath him in the census was a Daniel King who was older than he was aged 75 years.
Given the fact the name Daniel was given to one of my Samuel King's sons, it felt like this really could be the moment which revealed everything.
And indeed is was.
This Daniel King was born in 1761 and died in 1845 in Weston. It appeared on the face of it that Thomas and Daniel were brothers.
Interestingly, I visited the small church at Weston in January as I had found another line of mine, the Gooda family, were buried there. And here was another link to the place.
I looked on the Suffolk Record Office for wills of the King family and found that Daniel King had a will proved in 1845...
Original will of Daniel King of Weston. Suffolk Record Office Reference Number IC/AA1/265/24:
https://www.suffolkarchives.co.uk/collections/getrecord/GB173_IC_AA1_265_24 I bought a copy of the will and as I read it I was happy to see that it named the following people:
Executors: Nephews Daniel King of Yarmouth and Henry King of Beccles.
Beneficiaries: Children of late brother Samuel King and James Ellis and his daughters Maria Reynolds and Ann Ellis, and Elizabeth King [sister-in-law, widow of brother Thomas King].
Witnesses: C.T. Scott and Charlotte King [niece].
The executor Daniel King of Yarmouth was Samuel King's son, who was evidently named after his brother, so I had now finally traced my Samuel's line and found his brothers. The next thing to do was to find his parents.