nationwide_gb spider missing branches (regex not general enough)

[rjw62]

According to e.g. https://www.altfi.com/article/9347_nationwide-pledges-to-keep-its-625-branches-open-until-2024 Nationwide should have 625 UK branches. The current nationwide_gb spider is only returning 549.

One issue that is probably behind most (if not all) of the missing branches is that the regex r"https:\/\/www\.nationwide\.co\.uk\/branches\/[-()\w]+\/[-\w]+$" used to detect branch page URLs is not sufficiently general. In addition to word characters and hypens the final (branch) part of the URL can also contain a forward slash (used to denote house-number ranges).

For example: https://www.nationwide.co.uk/branches/northampton/18/19-weston-favell-centre

[Cj-Malone]

I don't know about the 625 number, but I count 629 with 22 "permanently closed", so 607.