So I have just arrived at London. Took the tube from London Heathrow to Central London to meet up with my sis. The journey took about 55 minutes and costs you 4 pounds on a single ticket. It's fairly easy and you probably won't miss the signals to Cockfosters. It's the last station of the Piccadilly line. So tips on getting to Central London using the Tube: Follow the train to Cockfosters and please mind the gap!
It has been a long journey with very little sleep. I'll be checking in soon.
*Seriously, you have to admit that Cockfosters is such a funny name.*