London is surrounded by opportunities to save money with coach hire. Perivale, even, is surrounded by such opportunities, with the West End to your east, sporting grounds to the south, Wembley Stadium to the north, and Heathrow to the west.
London itself is ringed with theme parks, tourist attractions, museums, special events, and lots more. Any location which attracts a lot of people be it in or around London is, by its very nature, a logistical nightmare. Some people dont even bother going to events and popular destinations because they know how heavy the traffic will be and how expensive the parking will be assuming they even manage to find a parking place which is not in the next county.
Coach hire is an obvious solution which is often overlooked. You could get a large group of people all of your family and a friend or two each to any of these locations with consummate ease and at a surprisingly low cost. Between parking fees, congestion charges, fuel, and the increased potential for damage, the fee for a coach, split amongst all of the passengers, is barely a fraction of what you would otherwise pay. It also means no waiting around for the others to show up before you get right into enjoying yourself because you all arrive and leave together.