I was expecting Ronnie Corbett.

Unseen Scene has tipped me off that given all the current jazz talk on here, the recent Ronnie Scott's documentary (Ronnies) is available on BBC iplayer right now and just on BBC4 last week.  There was also a cracking documentary on the Festival of Britain too that was a pivotal moment in moving us into new era post WWII, when we wanted to show the world that we were not just a tatty lion presiding over a crumbling empire.

Also episodes of Callan are cropping up on the Freeview Great Movies Channel. There were four series from the late sixties through to early seventies, the 3rd and 4th series were in colour and feature some good London scenes from the time. Last night I watched a colour episode and there was a scene outside Charing Cross station where Callan (Edward Woodward), in order to evade people who are following him, nicks a red Raleigh postman's bike and cycles off down the Strand. The postman is dressed in full grey uniform, peaked cap and collar and tie. Definitely a byegone age, they all wear shorts now even when it's minus 5c.

The Birmingham club was only a franchise.
When the International Convention Centre and Symphony Hall opened an enterprising local businessman pitched the idea to , I guess, Pete King.
The premise was to share artists who would be playing in London.At this time I would say Ronnie in London was getting plenty of World music acts as well as Jazz.
The problems were two fold. Firstly the cost of a night out in Ronnie Birmingham with snacks and a couple of drinks wasn’t cheap so you would only go sporadically.
Secondly some of the acts who played there were a bit niche.
The club stuttered on aided by a separate bar at the front of the building that was popular.
There is a lovely Charlie Watts album recorded there.

I'm reading, very belatedly, John Fordham's 'Let's Join Hands And Contact The Living: Ronnie Scott And His Club'.  It's quite entertaining in a rather superficial way.  Fordham doesn't manage to come across as earnestly as Valerie Wilmer always seemed to manage (it would be nigh impossible), but I can't help wondering if a tome by someone like Jim Godbolt might have been better. 
A 'superb musician'?  My father, who was exceptionally open-minded about the music he adored, thought not. 
But I'll follow up Alvey's tip.