Many thanks for the responses, I have been spending an hour since I posted the original staring from scratch.
I now have Eric at an address in Dagenham in the 1964 Electoral Roll and also an Annie Lamb at the same address, this address is the same as on his Death Cert which I have.
The Death Cert list his Daughter as the informant, I also have her marriage in 1974.
I have just found a death of an Annie Lamb in Q1 1991 and have just ordered the cert from GRO.
I did have a list of about 29 possible marriages and took a punt and entered the maiden name of one of the ladies into a new Ancestry search with the birth year 1949 +/-10 years and the surname as Lamb.
The result was 4 children born to a mother wth the maiden name of Pewtress, so I may be getting there as one of the names is the same as on Eric's Death Cert