Thanks for the imput Mike. I've tried panning before with usually very mediocre result although one biker got me my only ever POTW!
Certainly aim to give it a go as Sir Laminel is due through Poole at 17:22 tomorrow evening and if I can get away from work in good time that will let me practise on a couple of commuters first. However the steam locos tend to be a good bit slower than the modern trains and and although Clive's assesment of 30mph is probably about right I am trying to shoot a 45 degree angle which means the crossing speed will be slower still and I think slow panning is maybe even harder than quick panning
Must remember to set IS mode 2 to at least take that out of the equation.