The CAA proposals for changes to CAP 371 are at
UK CAA FODCOM
The proposed changes close a few of the loopholes exploited in the past by less scrupulous crewing deptments!
As interesting as the actual changes, are some of the responses from our employers - showing their true colours perhaps?
(The link above is a 44 page pdf so might take a little while to download if you aint got broadband, sorry but it's not my website!)