Not sure if I have my memory cells working corectly here. Think it was Hillington that I visited in the early 90’s. T’was the site of Griffon work, including test bed. Had to take some exhaust stubs up for Merlins that RR were testing for us at the time. They had modified the test bed to fit the Merlin i.e. blocks to raise the engine to align the propshaft with the water cooled brake and not using the second brake – only one propshaft on the Merlin. The test bed was a link to the past. The wartime pictures I have of Rolls Royce testbeds were very familiar. The most interesting aspect was the Merlins were running on open stubs, not silenced in any way, and the doors were open. You could here the din miles away. And no-one rang to complain. Less nimby’s in Scotland?