chalfontim
As Pontious states, the most common reason for a go-around at LHR is lack of separation with the previous aircraft. This can be for a variety of reasons such as the preceding aircraft just missing a turnoff and having to trundle down to the next one. However they can also be caused either by technical reason or because the aircraft that did the go-around was slow to reduce to the appraoch speed. As a pilot I am interested in finding out the reasons for go-arounds, especially if the reason was a technical one. Although they are not dangerous, they are a very high workload situation especially at the end of a long day with possible fuel considerations.
Several airlines, BA being one of them, require an ASR for all go-arounds. This is not because it is necessarily a safety issue but so that statistics can be compiled to try and prevent them in the future. I am glad that we are able to discuss them on PPRuNe as we are often able to learn something, such as the difficulty in slowing a 777-300.
Airclues