London Overground train makes rare diversion to London Bridge station

On Sunday morning, a London Overground train paid a visit to London Bridge station — a station that the Overground doesn’t usually visit.
Overground at Bridge (c) ianVisits
It was here for a test run ahead of a special service that will run on Easter Sunday, and the test was needed to ensure that what worked on paper also worked in practice.
The reason for the Easter Sunday special is weekend engineering works elsewhere which would mean no Southern trains between Victoria and London