[Talk-GB] Duplicate tram stop nodes in Manchester - how best to fix?

[SomeoneElse]

I've noticed that a number of the new nodes in this changeset:

http://www.openstreetmap.org/browse/changeset/15118353

are actually duplicates of existing ones.

Can anyone think of an easy way to identify and delete the duplicates in 
a systematic way (rather than, say, loading each one into Potlatch, 
seeing if it's identified as a duplicate, and manually transferring new 
tags from the new node to the original one).  Presumably there's some 
whizzy JOSM plugin designed to do exactly this?

Cheers,
Andy