Not really sure which forum to post this in but here goes. In April I'm travelling alone from Manchester (EGCC) to Heathrow. It will be my first flight alone as i'm only 16. I was planning a day trip to the Fly! London Airshow at Earl's Court. I just wanted to know how easy/hard it is to get to Earl's Court from LHR by tube train. Any advice would be appreciated greatly, I have looked at Heathrows website but I'd like a personal opinion about travelling via tube train.