Jookbeard
Yes, the Mitcham ground has long since been housing. As you were 3 at the time you probably don’t remember but the 69 Wembley stadium and Pool combined was I think a tortuous 8 day stint or was that an early 70’s Twickenham event? I’ve forgotten so much so the de-programming is working fine.
There were also a few D/A held at Wimbledon Football Ground in the 70’s.
You list your age as 38. Is that subterfuge as 3 in ’69 doesn’t quite add up?