I worked in Maida Vale for a time and would often have lunch with a couple of colleagues in the "Warrington" pub in Warrington Crescent. This is a large ornately decorated Victorian pub with rooms above and it has a wide staircase leading from the bar are to the upper floors:
https://www.thewarringtonhotel.co.uk/
It wasn't quite so sumptuous then as it is now, but still a fine pub nonetheless.
On one occasion we arrived to find John Thaw, Dennis Waterman, a couple of other thespians and a film crew holding court at one end of the bar. They were discussing the morning's filming which had taken place in the pub. "I don't care! I don't care!" Dennis Waterman was heard to shout to the assembled throng. "I'm not falling down those *** stairs again! I've done it three times this morning and you'll have to go with what you've got."
We were at the bar just getting them in and roared with laughter at Dennis's refusal to do any further stunts. We were "ordered" by him to make sure we watched the episode after he'd put in so much effort and he bought the three of us drinks to help us comply. We had a brief chat whilst expressing our thanks but they didn't linger too long, explaining they had to move on to another location for more filming in the afternoon.
This is the episode:
https://www.imdb.com/title/tt0714449/?ref_=ttep_ep7
Reagan is supposed to be keeping watch on a gang who had broken in to the bank next door to the pub using the pub's cellar to gain access (though in reality there is no pub next to the Warrington). But he gets diverted as the flat from which he is doing the obbo belongs to an old flame and observing the gang seems to take second place.
RIP Dennis. Great actor.