LOL - I've got it wrong before too. I'm glad I'm not the only one. Got it right this time though.
The concert finishes at 10 but with most things I'm assuming it will over run.
Last train back from St Pancras is at 10.25pm which I am guarenteed to miss.
I think I will have to stay the night. I hope there are some Formula1 or equivilent cheap hotels around.
Thanks everyone.