AndrewP
Striker
In fairness I lived round there and although I paid my Council Tax to Chester Le Street and then Durham, the postal address remained Houghton Le Spring.
It was never in Houghton le Spring, you may have wrote that on your address, so may countless others, but it the postal address for Burnmoor was never Houghton le Spring as it's never been in Houghton le Spring.
The whole of Houghton le Spring is in the City of Sunderland, next time you're passing the old station, look out for the sign saying "City of Sunderland" - that's when you'll be entering Houghton le Spring, regardless of what people put on their address.
I think the confusion comes from Houghton le Spring post office serving areas outside of Houghton le Spring, such as Burnmoor and bottom end of Fencehouses.