Earlier quoted context omitted.
Britain has different length area codes. 020 is London, 0121 is Birmingham, 01234 is Bedford, 015396 is Sedburgh, population 2700. The local part of the number is 8, 7, 6 or 5 digits accordingly. I never found this to be a problem. If you're dialing locally from a land line, you usually know the local code. For national or international dialing it doesn't matter. Occasionally people put the space in the wrong place,…
> Occasionally people put the space in the wrong place, like 0207 77777777 for a London number To expand on this, the codes have changed a lot over time. London used to have separate codes for inner and outer London, which at their last iteration were 0171 and 0181. These were replaced in 2000 with (020)7 and (020)8 respectively. At this point it still made sense, if inaccurately, to group the first four numbers. The…
Then at some point it was split into inner & outer, and there was endless one-up-manship about whether you had an inner or outer London code. (obviously, inner London was posher)