Flew quite a bit with Alan on Viscounts during the mid sixties. A very dedicated and professional operator. As F/O saw many Capts put through the wringer on "clearance to line " checks by Alan. Took around 4 days to cover the 3 variations of the Viscount and Alan was thorough. As a very junior F/O he came across as very different to the average run of the mill line Capts but I got used to this, enjoyed flying with him and saw standards that were to be aspired to. RIP.