Not many 3000ft mountains next to Heathrow.
For example at Ice station the missed approach is straight ahead to 3000ft,but we are terrain safe at 2000ft to the East.We can break traffic off an approach and be terrain safe below 3000ft.In fact within a certain area to the East we are terrain safe IFR at 1500ft,but I would only use that as a last resort.
In HK you're stuck because of the mountains so it's a different situation.You must go straight ahead to 4500 ft to get terrain safe.Hasn't stopped the odd flypast of the DB golf course though.
