It really irks me that so many businesses can’t format their London telephone numbers correctly.
The area code is 020, not 0207 or 0208 !
London numbers should be formatted like this: (020) 7946 0999
The significance of the bracketed area code is that you can omit it altogether if you are calling from within the same code area. So to call a London number from within the London code area you just need to dial the local number, e.g. 7946 0999.
Wrong: (0207) 946 0999
Right: (020) 7946 0999
Please point offenders in this direction for some education!