Well I have now sawn back the Buddleia myself and found there is a rabbit hole right underneath it, so fair to say the protectors were on for a reason! I have had a look under the tree protectors, its a bit damp there but there is still an inch or so between them and the trunks; I am tempted to take them off as I filled in the hole (left a bit of light at the top) and nothing has dug out so I presume the rabbits have vacated.
Spoke to the neighbour and apparently a while ago this place was well looked after and the residents were very self-sufficient and it has now been neglected a few years but nothing more. The soil in the old raised beds out the back seems very good, full of worms and relatively free of insects so must have been fed once I guess as its just chalky downs here. I will soon have to post up in the veggie section as I don't really have a clue what I am doing
No idea on the bushes either, theres a mix. The thorns are pretty vicious on the branches of most of them.
Thanks for your advice, much appreciated.