That doesn't match with the Land Registry record someone on Twitter has pulled up. I wonder which is wrong?
The property is currently being sold as Leasehold. Rightmove lists a freehold sale in 1998, so it is possible that it was simply the sale of the land, not the property and that the owners have indeed lived there since the 60s.
It will almost certainly get knocked down and block of luxury apartments built, as they have done with the property next door. Sell 6 of them for 300k a time, you've made a tidy profit.
Nope... look at the historical Streetviews. Sometime between 2015 and 2018 they added a new top and re-did the front (removed columns/pillars) or the building next door, but it's still the same building - looks like a nice renovation job.
Yes, I have way too much time on my hands and have spent way too much time looking at this!