Is it an outside cavity wall?
We had very odd scratching sounds in one house, in a bedroom. It turned out to be bats.
Another time we had a squirrel (neighbour's loft had several which took up residence).
We also have a squeaking noise which was very difficult to trace. It turned out to be the fridge and a refrigeration engineer said it was just the evaporator system, nothing to worry about.
French school children on strike
Hackers turned up the heat in French supermarkets.


