Advice is what I need,
The previous owner of my home plants a buddliea approx 6ft away from the back door which causes a problem as it blocks all sight of the garden from the rear windows
can these be easliy moved ?
They root quite easily from cuttings so rather than move it do that and then you have a new plant to put where you want.
Moving anything at this time of year is prone to failure
People often plant these near the house so that they can enjoy the sight of the butterflies without having to go into the garden - for this year could you thin out some of the branches so that you can 'see through' it and still get (and give) the benefit of the butterflies and bees - and then take some cuttings - then when your cuttings are big enough to replace the current bush you can plant them further away from the house, and remove the original without detrimentally affecting the food supply for your beneficial garden insects.
And don't forget that each spring you can prune the buddliea right down to below knee height, even if it's a mature bush - so the fresh growth each year shouldn't get too big.