CRB checks should be portable.

Why do individual health trusts and councils need me to get a new police check every time I switch jobs? 

In one 2 year period I had to have 4!

Why can't they be portable, and need renewing instead?

Why is this idea important?

Why do individual health trusts and councils need me to get a new police check every time I switch jobs? 

In one 2 year period I had to have 4!

Why can't they be portable, and need renewing instead?