CharlesPottins writes
Regarding boundaries, once places became built up there were bound to
be oddities - our old house when I was a kid had a boundary plate on
the side wall, between Manchester and Salford. (some people assume the
two cities were separated by the river Irwell, but that was only in th
e city centre. A teacher told us about this drunk who regularly fell a
kip each night on the bridge, near Salford bus station. A passing
Salford policeman would move him over to the Manchester side. An hour
or so later the Manchester policeman would come by and would move the
drunk back. Bit later the Salford guy came by again .. . and so on.
Happy innocent days).

A similar story was recounted by Nicholas Rhea in his books - from which
the Heartbeat TV series derives (although they changed the characters
name to Rowan for some reason.

--
Dave