I don't know what species you are referring to when you say cypress. There are true cypesses (Cupressus genus) and baldcypress, plus there are more obscure species with the word cypress in their names, like Leyland cypress. I also don't know here you live so I don't know what species is likely or the type of weather this tree is being exposed to. However, just the fact that you have potted these trees makes me think that water availability may be a problem. It can be very difficult to grow a tree in a pot, especially in full sun. The soil/root ball just dries out very quickly. It is normal to lose leaves or to have discoloration after transplanting though. 

Thanks so much Michael.  They are Italian cypresses. Cypresses semper virens. I'm in London UK. I've attached some photos. The trees have gone slightly lighter with some branches going brown. Also the leaves are very fragile to the touch. The pots have been kept moist either by watering or the good old fashion London rain. Does that help in any way? I'm a total novice so it's very kind that you have answered so promptly. Thank you.

Thanks so much Michael.  They are Italian cypresses. Cypresses semper virens. I'm in London UK. I've attached some photos. The trees have gone slightly lighter with some branches going brown. Also the leaves are very fragile to the touch. The pots have been kept moist either by watering or the good old fashion London rain. Does that help in any way? I'm a total novice so it's very kind that you have answered so promptly. Thank you.

I suspected as much.  I did follow the instructions to the letter but it was not to be this time.  Thanks though for all your help.

Frances

You're welcome.