BT PCP cabinets in Enfield, Southgate, Barnet, Whetstone, North Finchley, Potters Bar, and Cuffley

I.e. parts of N14, N12, N20, N21, EN2, EN4, EN5, EN6, and EN7

I.e. parts of the coverage of LNWIN, LNENF, LNBAR, LNPGN, LNNWS, LNNFN, LNPOT, and LNCUF exchanges

In my excursions around the area near home, and with the help of the spreadsheet mapping postcodes to BT PCP cabinets for FTTC (see below, there's a more recent version) I've managed to locate a number of BT PCP cabinets on the ground. So I started with a Google maps overlay of BT PCP cabinet locations for Enfield, Southgate, Barnet, Whetstone, and North Finchley

Clearly this sort of approach won't scale to the whole country - in fact, Google Maps goes rather odd when one gets to 200 pins (as one can see on the above map - pins shown with the wrong icon, pins shown in the wrong colour). For this reason, the above map is no longer being updated.

I'm not sure of the best way to divide areas. I don't think mapping each exchange works, because one really would want to know the coverage in a geographic area. Mapping by the first part of postcodes doesn't seem right either.

For the time being, I'm experimenting with showing one exchange's coverage area, with its immediate neighbours shown as well.:

Progress

Updated spreadsheet

The spreadsheet I mention above is dated 13 April 2011 and covers up to deployment phase 7b. There's a newer Postcode to PCP cabinet spreadsheet which covers up to deployment phase 9b, the filename is dated December 2012 (I'm writing this on 1 May 2012...). If you do File,Export you can download it as a 58MB csv file.

Corrections/updates welcome