wait until autumn

What is its size. If it is large say six ft or over it will have a rather large root system so the root ball is going to be tough going getting it out and getting it back in again and you may not be successfull in maintaining the plants viability. In that case it will be better to start over in the new location with a new plant or cuttings from the old one. If it is on the smaller side then moving will be no problem. I recommend cutting it back a bit to allow for a smaller root system. This way the plant will not be too stressed.

Thanks that sounds sensible.