Hi,
I found union jack to be a bit expensive although very helpful.
I’m not sure where you’re based in the uk but I found this company who were recomended to me. They were very helpful and reasonably priced. There name is “The Old House” based in Seaford, telephone number is 01323 892934 http://www.amsmoving.co.uk. I know the name is a bit strange but they were very good. They go all over France and Spain every 4 weeks I think and also offer some free storage depending on the size of the load.
Hope this helps
Ronnie