So before I go shopping does anybody have an opinion on what is the best all
in one car wash/wax product? Simoniz, Car Plan? Halfords own brand?
Something else?

"Collinite 476" was mentioned recently in uk.rec.cars.maintenance - by
the sounds of it, it's good enough to only need doing once a year (!)

If I ever get a new car, it's what i'm going for :-}