Originally Posted by JimBall
This obstruction is inside an ATZ. As such, all approaching the ATZ should be reminded of it. (My view - but apparently not a rule) Maybe, because it's right on the edge, that reminder has to come from Heathrow before handover to Battersea?
Surely this is the reason the NOTAM system exists?
You are correct that there is no rule for ATC to warn those approaching the ATZ of the obstruction, unless of course it has not been subject to NOTAM (this one was and was valid from 7th January), there is however, a rule for pilots to take all reasonable steps so as to be satisfied the flight can safely be made, taking into account the latest information available as to the route and aerodrome to be used, the weather reports and forecasts available and any alternative course of action which can be adopted in case the flight cannot be completed as planned.