Not sure they'll be of that much use. The Bristol manuals are for the interim procedure (ie they are mainly fixed wing based) + a copy of Wagtendonk. The interim procedure is being withdrawn in July so unless you'll be enrolled before then they'll be as much use as the proverbial chocolate teacup.
After that I believe the syllabus will be completely different (and hopefully worth doing). Nothing on the Bristol site about them offering the full ATPL(H) as yet.