Hi Walnut8,
I'm in Limehouse too. Your doc is right, there's no chance of getting into St Thomas's if you're out of the catchment area - it's very popular and they'll only take you if your GP argues there's a medical need for you to be there over somewhere else. We had a go and failed! The natural and nearest choice for you is indeed Royal London. Don't be too put off by some of the negative stories you find on the internet about it (people only usually leave reviews if they've had a bad experience I think). Sure, it's an old Victorian style hospital but I've had my bloods done there and my first scan (I'm 14 weeks now) and I couldn't be happier with the level of care. The sonogragher was brilliant, top-of-the-range machine and everywhere seemed very clean and friendly on the inside.
I would advise you to go on a tour, that's what we did. It's every Thursday at 5:30 (call ahead to check in case they've changed the time since I went). There were lots of couple on the tour the night we went and everyone ask lots of questions so you come out feeling rather more informed than when you went in. The midwives running the tour seemed very professional and friendly. The one down-side is that the delivery rooms are fairly small don't have bathrooms so you have to head down the corridor to find a loo, not great but not the end of the world either. As for dirty rooms with blood up the walls - (as I read on one website!) I didn't see anything to make me suspicious of that and I'm a very suspicious patient!
The Barkantine is your other option. My midwife says it's fab and she'd love to work there. In fact, living in Limehouse, we're really lucky to have access to such a top-class facility. Like giving birth in a 5-star hotel I was told. Every room has a water pool, a double bed and a plasma-screen tv! Only down-side is no epidural and I just can't make my mind up about whether I'll want one. It's clearly an awful lot nicer than the Royal but it depends on your needs.
Bottom line, don't worry about the Royal, it's really fine. Go and have a look and then make your decision.
By the way, are you with Limehouse Practice on Gill St? If so, you have all your midwife appointments there and they come from from the Royal, so if you choose to go to another hospital, you'll have to trail to that hospital for every apppointment - they won't come to you. Something to bear in mind in the later stages perhaps...
Good luck!