Ask HN: Where to stay in London for Startup School Europe?

Hey guys, I'm sure there are some of us who got an invitation to Startup School Europe, are coming from outside of London, and are wondering where a good place would be to sleep for a night or two. Are there any HNers in London who want to offer their couch? I'd love to crash with some friends. If not, can any of you recommend a hostel, and perhaps a hotel as well for those who want a hotel instead?

Startup School Europe is on July 26th, a Saturday, and the venue is near the Barbican tube station.

Cheers!