As good a time as any to ask this question: Why do different crews with the same airline on the same type react to wx radar differently? Time and time again during bad weather we get one crew asking to turn left 10, right 20, etc and the guy behind just goes striaight on. Some of the gyrations are quite extraordinary - eg 747 into BNN wanted heading 200 and got down to MID before he'd turn R or L. Another guy at LAM came off heading 160 for 30-35 miles before turning right towards BIG. During both of these events other aircraft of similar type were making perfectly normal approaches.
Anyone have any ideas please? This really is meant to be an intelligent question from an experienced Heathrow Director. With busy traffic it's getting inccreasingly difficult to approve such deviations from routes and it's obvious that some crews simply don't realise that in certain circumstances they either hit a rain cloud or another aeroplane.