Not the best area in my opinion. Heathrow's surrounding areas are a bit grim, or were when I was community nursing there 5 years or so ago. I wouldn't walk around alone in the dark. Better to get a taxi into London, just be very careful with your wallet, the pickpockets are professional and you won't even spot them. Don't give money to the Eastern European beggars either, they pay hundreds of pounds a day to rent space in tourist areas, they are anything but poor, even the Romanians with tiny babies. London is a lovely place and exciting to visit, don't be put off. I hope you have a happy and safe time. JJ