You just have to argue LS, presume you feel better. Okay, in answer to long lecture on planting trees next to houses, no, it is not wise to plant Leylandi within 20 feet of your house, apart from the long shadow they cause when they grow to a hundred feet also their roots go along way to pulling your foundations apart ;) and of course there is subsidence of drains as well.... as a matter of fact I owned a house which developed large cracks because it was built over an old 19th century well and the damage was expensive...
I was arguing about bronze age barrows, not saxon, there are after all fewer of them, whereas there are great sweeps of earthen barrows around Wessex, which don't have that many stones in them, but as the victorian vicars spent most of their time digging for victory in them, they are already damaged anyway...
p.s. I promise never to defend trees on barrows again.... ;)