"what permission/qualifications do i need to take a fishing boat out on a river an estuary or the sea :) UK ON

Question

Can any body please tell me

"what permission/qualifications do i need to take a fishing boat out on a river an estuary or the sea :) UK ONLY :)"

IF ANYBODY CAN HELP, OR POINT ME IN THE RIGHT DIRECTION THEN THAT WOULD BE GREAT,

BUT PLEASE U.K. ONLY THANKS :)

Answer 1

you dont need any