Funnily enough, I visited The Angel earlier this year, ticking it off the list so to speak. I walked it from the tube, and I always have a wander looking at buildings, nip into pubs etc. As I was wandering, I asked the only person I saw ( this was just on opening time ) how close I was to The Angel. The chap was wearing what reminded me of Olympics apparel, I think it was the purple (?) that gave me that impression. Any way, he immediately replied 'You don't want to go in there, awful pub, awful man running it, not a nice place at all. You'd do a lot better to give it a miss and go to The Mayflower, a much nicer place'. Plus a little more, disparaging remarks. I asked if he lived in the area and he replied in the positive. I got the impression I was going to have to fight my way out of the pub. As he was speaking I saw he was an official Blue Badge London Guide.
Anyway, I obviously carried on and visited The Angel. I wanted to see why he had expressed this opinion, naturally I was curious. Well, the manager was on holiday, the main man was a young Polish fella, extremely courteous, helpful and friendly, I spent over an hour talking to him, very little in the way of clientele, no unpleasantness whatsoever. Decent pint (s) too! Obviously I visited The Mayflower too, before travelling to The Captain Kidd. Obviously I can't express any opinion about the manager, but found the guide's remarks interesting in light of the above.
As previously mentioned, all S.S, pubs have a sign informing of the surcharge. And so does every London pub I've ever been into over the last 5/6 years - it's as common a practice as pulling pints, due to the prevalence of people paying for everything from a single pint with their credit card, something I had never seen until I started visiting London. I assume it's either because they can't get any cash out as they are permanently overdrawn / living on credit, or are simply part of a cashless generation. And you often see signs saying you have to spend a minimum of £10 / whatever if paying by credit card, in shops, pubs, smaller retailers, surcharges are even on govt. websites - car tax for instance, also car insurance, so I am at a loss as to why the complainant feels this is fraudulent.