My dad retired at 56 in 2017 with a full government pension, him and my step mum were mortgage free and she was an also a civil servant . Retiring in your 50s isn’t that common now but people still do depending on their financial circumstances.
My step mum’s dad ( I didn’t know him back in the 1980s) would have had a British telecom pension that would have been a government one, before it was privatised which happened a bit later. So it would have been generous with 30 plus years.
As for Harry, was born in the 1920s, as was the actor . Same for Paul Collins. They were war time generation, and I think both served in the war in real life too.
Sadly that generation has pretty much all but gone now, but I suppose that’s down to the passage of time.
Bit of trivia, Edna, well the actress rather , was in the very first episode of Coronation Street.