Thanks for offer but what I am looking for is relatively safe place to run the engine in which, after 1st hour means running it full throttle for periods which, correct me if I'm wrong, would exceed the speed limit on non tidal Thames.
Having failed to find a reasonable priced waterway around me that would have allowed full throttle use, I am reverting to Thames around Hampton which I know very well or Basingstoke Canal for my sons rowing lessons and possibly Thames below Teddington for faster (hopefully planeing) runs. Eventually the boat will be based in Littlehampton and I was hoping to avoid the run through the river mouth until after I had become more familiar with things and happy that it was all running 100%. I'm probably being a bit cautious, but its nearly 25 years since I last drove a motorboat and I'm not as fit as I use to be to row myself out of trouble.
Might take you up on that offer next year when I hope to travel a bit further afield. South coast from littlehampton and Chichester harbour are my plans for this year.