You didn't work on the SLA1 then? We still had one at Farnborough in '82, replaced by a CR62 in about '83, we never had an SLA3 of any mark although we were supposed to get the one from Pershore, it was delivered but then it was given to Bedford instead. Then when I did my PAR course at Shawbury in '84, I was trained on the SLA3 sims when I would never use it in anger apart from live traffic in Shawbury Tower.