Lhr 777
Sorry Clandestino that is not the case, whilst you may be gear up at 4nm due' noise abatement' big company regs require stabilised approach at 1000 feet AAL. Thats flap 30, landing checks done and gear locked with power stabilised. You cannot fly the profile you claim on a 777, it won't match company stabilisation criteria.
For the 777 which takes 400 feet to select gear down to locked on a 3 degree approach, and then 400 feet to go from flap 20 to flap 30, you need 800 feet minimum. You should not select flap 30 with gear still travelling as you get a config warning. So 2000 feet AAL is the BA (and other) recommended latest selection of gear and 1500 feet AAL latest flap 30 selection. Vref30 will be sigificantly below 160 kts, requiring power down and time to stabilise and then spool up for the 1000ft AAL gate.
777 autothrottle responds slowly to speed reduction commands but more quickly to speed up commands. If it needs 160kts to 4 nm, you either bust the 1000ft stabilisation point or you anticipate the speed reduction by a mile or so to achieve a decent satbilisation at 1000 ft AAL. Sesma will trigger unstable approaches and you will be called in.....