> Tintern, in the Wye Valley, Monmouthshire
There's also plenty of "upon the"s and "x-in-y" (ie: Henly-in-Arden). Not just the England but seems just as common in Scotland, or even more common.
I can imagine the early computer systems of the postal organization having to deal with these quirks.
[1] apparently "weird" is being taken as bad or something. I like weird.