Maybe Maybe Not
Never really taken to the shooting the hole explanation. LHR is an evil place at the best of times with the strip in a funnel valley with constant strong SE winds and high hills and a mountain at the end. Given it away many times there simply because of the sheer and turbulence in an approach from the west will push you up and down really hard (Seen +/-1000 fpm in the holding pattern on a bad day). Think they caught caught at LHR in an unstable approach at a point on the GPSNPA where the minima is literally that 300ft. The wind is always across the range at that point pushing a stream of eddies and lee turbulence at that critical point if they encountered even isolated sheer at the speed they were travelling and uncontrolled ROD it was game over! Sensible course is to take the NDB or the let down over water to the east at about 5-10 nm to 1500ft any day to the GPS NPA as currently published. They haven't produced one from the east because in my view with the prevailing winds it would always result in a circling approach which would be an ask in anything above CAT B.