A trip to London, eh? Should Sara Payne go into hiding?
Ouch! Ouch! Seven-times ouch 
Please excuse my ignorance - I normally let these go by, but this is such an odd one that I have to ask for further explanation, please.
So as not to completely hijack the thread, I agree with the other respondents that you are very unlikely to encounter trouble.
I expected Captain Lance Murdoch to understand, but as he has not responded, I will explain. The Captain is one of the leading contenders in the Straight Dope Death Pool. I administer the game. Sara Payne is someone on his list who lives in/near London, so I was suggesting that the Captain may be heading to London to boost his points total by accelerating the demise of Ms Payne.
Mind you, that is against the rules.