Thanks Clive - thats going to make for a very interesting challenge to get the composition right. I think your assesment of 30mph is probably about right. This one was picking up speed faster than Britannia did a couple of weeks ago but even so they are on a bit of a climb.
The trouble with panning will be were to stand as there always a fence in the way and for this shot I lean over/rest on the top strand of barbed wire to get a clean image and this will inhibit a smooth pan. Prehaps a set of steps is called for.
Next oportunity to test the theory will be next Tue afternoon although that one will be passing through, rather than starting from, Poole and may be going a bit quicker.
