Many thanks for all replies.
VERDUN - I've just found the labels I've kept from the plants.
Juniper Chinensis - Blue Alps (which is showing a little browning of the pendulous branches) &
Juniperus squamata - Blue carpet (this is nearly all brown now), but I note from the 'Position' on the label - wide range of soil conditions ' except extremely wet' , so I guess this is my problem. With future (months or years?) weather conditions expected to continue wet, I could always put a pond in.
We live in a totally exposed situation on ALL sides of our property, no tree shelter; and not allowed to plant any. Hedges are kept at roughly 3/4ft, as we are surrounded by farmland.