Sycamore - the pilot of that Vixen was a friend, Nick Parrett, who joined the RN the same day as me. Super guy, as was his Observer, Tim Woodford.
It was thought Nick became disoriented on the final turn of a night GCA into Changi whilst dealing with a hydraulic failure. He had taken off from Eagle. Both crew were still aboard the aircraft when the wreckage was eventually found submerged.