We just heard from a lady in Southampton who found these in her garden today. It is still very early in the season so they are unripe with little flavour or aroma. Read more on unripe truffles here.
Interestingly, the geology where they were found is sands and clays, not the expected chalk or limestone, proving that not all truffles read the book. A possible explanation is that when houses are built soil is often brought in from other areas. Also, builder’s rubble (cement and concrete) contains calcium carbonate which can increase soil pH to high alkaline levels into the desired range for truffles.