Hi Mike and welcome to the forum. I'm not aware of anywhere here in Yorkshire operating the kind of beat system you refer to, such as that found on some of the chalk streams or the beats of the Tamar you mention. But fear not! Firstly not a single person you'll ever meet on the riverbank didn't start off from the same place you are now. We all remember it well no matter how much we try to forget

the arm flailing is wrong but all part of the learning curve- just get in there and don't worry what anyone else thinks- practice makes perfect and I obviously just need a lot more practice
Having said all that there's a million places here in Yorkshire where perhaps you'll never see another sole all day. If you drop me a pm with roughly where you're staying I'll try to point you in the direction of such a place. In the event you do bump into someone else the etiquete is quite simple- just stay as far away from him as you can without spoiling you're own fishing, assuming he does the same- problem sorted
CJ