Found a damp proof company (with 20 excellent reviews) on trustatrader.
Came round stuck a moisture monitor in my walls and said I had rising dam on two walls. Didn't even test if rising damp or penetrating damp and I have a clearly visible damp proof course.
Told me he could do the work the following weekend or if we wanted it done next week it would be more.
Honestly, how can this possibly be a trusted trader?