CY333
As far as I am aware, there is no hard and fast rule applied in all cases. If you clear 75% then you should be ok and I seem to recall being told that there is an average improvement from finals to ATPL's but can't remember if it was 5% or 10% improvement.
Probably if you did ok in 6 out of 7 but only got 60% in 1 area then you would be invited to resit the internal exam but would still be put forward to the ATPL at your discretion?
I don't recall anyone on our course having any problem with any of the 14 subjects though and our course average over all 14 subjects was around 96% so the instruction is good (but then so is Bristol ....
Phil.