[Talk-GB] Reversion

[bob at bobfoulger.co.uk]

Changeset 3149927 by new mapper jakbu makes changes which are invalid
and do not reflect reality. I've emailed to ask if the changes were
intentional, but can the changeset be reverted as a whole or do I have
to go through all the changes manually. Fortunately there are not too
many changes in this instance, the area does still need mapping
comprehensively.

BobJF