Quite a tight sector fuel wise. Presumably Perth airport is Cat IIIC equipped to match the aircraft capability on arrival?
Given the arrival times Perth won't be as big an issue as arriving at 0510 in London with the statutory U.K. reserves plus a bit for holding at Lambourne. Get there an hour late after 0600 and that could multiply significantly for a sector that will be tight on a good day.
236 punters …….maybe not.