Hi Admin and thanks for the reply. I'm pretty confident I can get it all working, in fact the stuff's in my shopping trolley now. There is a fair amount of info around, but most of it refers to the APM controller and the Pixhawk looks to be a little different. I now see that the telemetry Y lead looks unnecessary with the Pixhawk as it has two telemetry ports as opposed to the APM's single port.
At the moment I'm trying to decide whether to stick with my current Spektrum radio stuff or change to something else (Taranis?) and maybe even go UHF.