Hi Ewan,
The beats Jim refers to are beats 6&7, if there are two of you then book one rod on each beat then you effectively have both banks, 7 is one bank, 6 is the other. My favourite beats are one & two, if pushed I would have to say beat one. Only problem is that when there are salmon about regardless of water height you are often pelted by spinners from the opposite bank, Castle Forbes & Tilliefoure which can really F*%k things up after you've spent a long time locating something you want to throw at.
Cheers
Ben