Re. fuel remaining overhead EGLL of 8+, what's the problem, that would probably get you to EGKK or EGSS as a full alternate with the B787, based on my B767 time.
Agreed, not sure why 8T is remarkable. We (local T7 operator) regularly plan on landing at EGLL with under 7 tonnes...that gives the option of EGKK from the go around, getting there with 30 min reserve...8T overhead LAM (the north east LHR hold) would give EGKK and EGSS as options.