Don't worry; your chances of being "outed" are extremely low, especially if you don't post your name or picture, or details.
If you search through my profile posts, you'll see that I give a lot more info about myself than you do, and even so, it would take quite a lot of bad luck and/or a very determined and skilled researcher to out me.
That said, I haven't had SRS, don't live in the UK and haven't researched the whole thing a whole lot, since over here, there isn't a choice for the surgeon (luckily, he's a reputable and respected one). But I'll try to help as much as I can.
I'm not sure (and to be honest, a little lazy right now), but I think I saw a few questions about Brittish surgeons in the SRS section recently. Perhaps there are tips to be found in there.
I think in the UK, there's a rather well-organised (though contested, but this is not the point) official route through the "NHS", I think they called it. I think that if you call the people in charge of those things, you could get them to tell you what surgeons they recommend patients.
I also think that many Brittish patients disregard surgeons from their own countries, and decide to travel to the US (several equally renowned surgeons), Thailand (dr Suporn mainly) or Canada (dr Brassard) to have their SRS. But then again, some others say that it has gotten better in time, and that there is no need to travel anymore. I'm neutral on this, being entirely ignorant on the details.
As for piano, I'm quite sure that just 24-48 hours after surgery, if you can bring an electronic keyboard (not the same sound/quality/feeling, but hey, it does the job if you're on the move, even for a "pro" like you, I'd say!) to your hospital bed, you should be able to practice at will... Bring headphones, though, in case nearby patients are annoyed.
As for actually getting up and going to practices, I think that 2 weeks is a safe average delay. Most surgeons suggest not leaving the bed too much for two weeks (one week only for some, but since those cases I heard of were all in the US, I think it's more like a bare medically safe minimum brought by financial concerns than a recommendation).
If I remember well, they also recommend to avoid regular/intense activity for one month: intense exercise, work for people whose job includes a lot of physical labour, biking... But I think that a relatively sedentary (at least for the lower body!) activity like piano is probably safe within this delay.
If two weeks without a piano class is too much for you, if your hospital has an Internet connection, perhaps you could arrange something with Skype and an electronic keyboard with your teacher.
PS: 32 hours! I wish I could be so dedicated. With that much practice, I'm sure you could go semi-professional!