On 25/03/2021 21:58, T i m wrote:
I started to hear a regular 'clonk-donk' as cars were driving over
something in the road, like a bit of chipboard shelf but it then
persisted for around a couple of weeks.


You've reported it so you have done your civic duty. Someone mentioned
expanding foam. If there is a reasonable gap in places, how about a
generous injection of No More Nails or similar. On a dry night, when you
are sure no-one is watching.