Your argument is correct Silverstrata, its just that your example is wrong because LHR is linked to Bristol by the M4 which isn't at all bad as far as traffic goes westbound. It really isn't worth flying to Bristol from Heathrow. At LHR you would need to take up the transfer time to a different terminal (naturally), allowing yourself sufficient contingency, and then after a 30 minute flight (10 minutes of which is taxiing) you wind up at Lulsgate Bottom, in the middle of the Mendip Hills. After clearing customs you have to wait for a bus which takes half an hour to transport you to central Bristol where you can meet up with your fellow passengers who've avoided all the transfer hassle and the bus journey and have travelled in the comfort of their hired Ford Focus and are already on to their second daquiri at one of Bristol's exclusive cocktail lounges.
A much better example would be Exeter, or Doncaster/Sheffield, or Humberside, or even Norwich (the M25 really is a brute of a motorway)......
Last edited by Barling Magna; 29th Jul 2013 at 16:06.