Graham J wrote:
I seriously wonder what percentage of London to London calls
between
fixed lines - which can be dialled without the 020 - actually are
dialled without the 020.

Does leaving out the 020 actually work reliably when you aren't using
a BT
line or are redirecting calls via another provider? I always use the
020
myself regardless.

I never dial the London area code from a land line, but dial the
8-digit number. From mobiles you have to dial the full number with the
London area code.

Friheej