Pete,
Whilst the films the LDS have are very very useful, sometimes there are missing years which are not always given in the film notes you'll find in the LDS library catalogue. As I said earlier, some data are missing from the Coaley bishops transcripts of the parish register, so there's no point in your searching that film hoping for those years.
Aside - BT's were supposed to accurately give data from the PR's and a few parishes's BT's were "exhibited" (the word used on them sometimes) at the annual visitation of the bishop (or representative - archdeacon) at one parish in the area (probably at a rectory having a decent cellar!). And a jolly time was had by all I expect

BT's often cover from Lady day one year to Lady Day the next (they sometimes say) and I've even seen evidence of one's individual sheets of paper being sewn together into a long strip and looking like loo paper

If the parish register does give the missing data for those years, the only place to search is Gloster RO because the LDS have not filmed the Coaley PR's. I do not know if the Gloster RO can say if the years are included in the PR's. Might be worth contacting them before going 60 miles only to find they are missing.
Another address for your favourites is
http://www.genuki.org.uk/big/FindingBatchNos.html it's procedure is self explanatory.
One bright light in years ahead is that the LDS have a project in hand to make all their films' pic's available on line. They have so many films it will take many years before much is available so do not hold fire on your research

By the way, I think most if not all, LDS FHC's have films of the Office for National Statistics' birth, marriage and death indices.
You will find the LDS FHC people very helpful and friendly.
Regards
Chas