Agree with you BCNBoy about getting behind LGW but the truth is that everybody wants to fly into Heathrow. Look at the number of US airlines who have moved their schedules as soon as slots have become available. Regarding domestic flights it is quite obvious BAA do not want many domestic flights at Heathrow they want the European and long haul so they can charge expensive landing fees and also get more out of passengers who will spend more on shopping!
PS Always liked LGW but unfortunately it is some distance from where I want to go to when I have to return to the UK so I use the airports north of London. Cheers