We both became aware of s significant creaking from the rear of our car at low speeds when pulling our Troll back from Wales.
Suspect it may need greasing and there are 2 grease points near the towbar of the Troll so may need greasing. Any other suggestions.
We are off to Sandringham CC site in mid October

The 2 grease points behind the hitch on mine are done each year as part of its annual service, have you tried cleaning the towball and the stabiliser pads?

There is a third grease point under the hitch. I think it only greases the handbrake linkage though.

Thanks for the advice, will have a go at cleaning underneath of coupling with emery and meths