Thanks guys: I was loathe to put "DCT SAM" in because I will avoid their airspace (ref. another thread about Solent Radar SSR being u/s and could we please steer clear etc.).
But as you are saying that I can simply put "SCT SAM DCT MP" etc. without flying that route exactly, just flying something similar to it, and that this won't apprently cause consternation at Solent when I don't call them en-route, then I think I will amend plan to the simpler version.
Thanks guys,
Andy