I agree with all that, I was thinking of the fact that he was said to have had a head injury, which is an unusual way to commit suicide. There are no more details.
I'm afraid that's right about black cab fares. If you are going to the airport there is the additional £5 drop off fee. Cheapest way, though also slowest, is Piccadilly line which goes through the centre of London. Heathrow express is a rip off!