Beech woodland is where to find them. Some friends of mine planted some about 20 years ago and the woodland has changed so much in that time we’ve absolutely no idea where they are. The new Labrador is going to be trained using a bottle of a chemical that is the same smell as the truffles.Was just about to say the river cottage thing.
I saw on something like countryfile a couple who were trying to grow them by planting there favourite substrate which was some species of tree, apparently they like the younger trees too compared to mature ones.