777..
Get thru the sim first then worry about it ... 24% overall process pass rate makes it entirely academic till then... After that ... Go the 777 for career path in the future ... The 787 is likely to come off LHR once the Brits relax the visa system to that of EU ... They want a bite of the Chinese tourist ( 150k to UK per year due to hard to get visas ) versus 1.1 mill to EU !!!
With slot limits the only choice is a 777 or more 380s , with perhaps an interim return to the 330 ...
See EK uses Five 380 s daily to LHR I think due this??!
Wja