Continuing with Friday 10 May, QF37, the 1615 hours afternoon option from MEL up to SIN departed at 1712 with arrival delayed until a predicted 2320 late tonight, 55 late. A332 VH-EBJ has the task.
Timewise, 'the 9' (MEL - PER) is usually pretty good but today was another exception, with departure at 1628 hours being 73 minutes tardy. PER arrival should shortly occur at 1847 hours, 92 late and after the 1845 scheduled pushback for the long trip to LHR, which should now occur at 2010 tonight Perth time. Saturday 11 LHR arrival is estimated as 0635, 90 behind.
QF450 (B738 VH-XZO, the 1830 hours early evening MEL - SYD) took off at 2010, so arrival should be at 2119 hours, 84 late. QF464, the 1930 hours has larger A332 VH-EBA and was in the sky at 2021 so at gate arrival should be 2129, 34 minutes behind the timetable. Southbound QF465, the 1900 hours scheduled ex SYD did not take off until 2008. VH-VZA should arrive at its MEL gate at 2124 hours, 49 minutes tardy. QF479, another SYD to MEL (the 1845 hours) was airborne at 2018 hours so its at gate arrival is estimated as 2133 mid evening, 73 late for VH-VYC.
The 1850 hours CBR down to MEL on Friday 10, QF833, was in the sky at 2004 with Vh-VYK suggested as arriving at 2102, 62 minutes past the timetable.
A388 VH-OQB (1555 hours QF1 SYD - SIN - LHR) pushed back later than expected, at 2035 and at 2048 was still taxiing in SYD so is likely to be later into SIN that estimated above by QF. This will also adversely affect the SIN - LHR timings.
The PER - MEL QF10 arrived on Friday 10 at 1929 hours, 34 late. It's often early or punctual.
UPDATE: QF1's estimated stay in SIN is (Saturday 11 May) from 0246 to 0415 with changed LHR arrival at 1045, 260 minutes tardy. This is 20 minutes later than QF had originally estimated in post #10278 above.