When I did my Powerboat 2 I was told that I could only launch from New Brighton and that I would need a permit (which I purchased). Subsequently Someone from this forum (Scotland) kindly informed me of a sailing club in Liverpool near to the airport (John Lennon) that I could launch from. I went to see the club and joined - it is a fantastic facility!! Check it out. Next Saturday (30 June) is a cruise up river!! I am sure they would be happy for you to come along as a guest - get in touch with them