Last year while attending Obedience Shows I noticed that some Competitors had cloth screens with wooden posts around their cars for added privacy.  The type you used to see (perhaps still do) on beaches - used as wind breakers.

I would like if possible, to obtain a couple for this year.  Does anyone have any ideas as to where I might locate them?  Are they very expensive?  and what exactly are they called?

Grateful thanks

Windbreaks.  Probably a camping caravanning show will be your best bet.  I took one as my prize when I won BOB at one of the Champ shows last year, as they are one of the prizes you can choose from.