Last MP elected in the 1945, 1950 and 1951 Parliaments.
Three oldest surviving MPs are now: Ronald Atkins (Labour, b. 1916), Lord Denis Healey (Labour, b. 1917) and Sir Albert McQuarrie (Conservative, b. 1918).
From the 1955 Parliament, there are 8 individuals still living:
Sir Richard Body (b. 1927) Conservative
Sir Robin Chichester-Clark (b. 1928) Ulster Unionist Party
Lord John Eden (b. 1925) Conservative
Lord Denis Healey (b. 1917) Labour
Lord Robert Lindsay (b. 1927) Conservative
Lord Roy Mason (b. 1924) Labour
Tom Mitchell (b. 1931) Sinn Féin
James Ramsden (b. 1923) Conservative
Survivors for later Parliaments:
1959: 19 / 629
1964: 49 / 630
1966: 83 / 630
And then too many to count from the latter ones...