"David Cantrell" wrote in message
k...
On Wed, Jun 15, 2016 at 10:30:38AM +0100, Roland Perry wrote:

If all fares originating in the UK go up, then competitively it's still
a level playing field for the airlines

Not quite. Airlines that rely heavily on UK hubs will lose out to those
that use non-UK hubs, as more passengers will choose to change in Paris
or Frankfurt instead of London.

but just what is this underlying reason that will make (BA) fares go up in
the first place

I don't believe that it exists

tim