The first photograph of the hall was taken about 1997-8. The last two were taken in 1987-8. While there they were just demolishing the Briefing room , all the electric was off, just the workmens gas lights on . It was a dark wet cloudy day and dust was everywhere. But they told me to take some photographs before they got on with it. As i had no flash-gun with me i could do nothing !! So had a quick look around , stood up on the platform by the large board then went outside to photograph the compass that they told me of engraved in the main step. The rain started just then..... typical !!!