It is relevant as OTHER posters on the STANSTED thread introduced the mileage discussion to support agendas...
It is also more relevant to London I grant you that...
The fact that other posters congratulated themselves on a quite unclear answer & I sought to add that Marble Arch has been used for weighing distances for airport development for LONDON then I regard that as a fact worth pointing out...
The threads are for discussion & facts are they not?...
PS...You have now prolonged the discussion by at least the two further posts!....
Everyone has options to read or delete or ignore ...(as in the case of the last two options everyone else has now done lol)...& of course PM which in my view of the tone used by you is certainly not required thanks...