I did some work experience with a gamekeeper a while ago, it was easy for me because i already had contacts. If I was you try to contact local estates and ask around at local clay grounds or ask your local RFD if anyone knows gamekeepers which may be willing to take you on for a week or two.
Work experience is extremely useful in both getting into jobs, university courses and apprenticeships! Its also (from my experience) extremely fun!
Another overlooked aspect of work experience is gaining contacts which can offer references or even jobs.