Re: river hamp avon
Not sure about the Royalty except for a few barbel to maggot feeder. As Fred says, Davis Tackle will give you all the info you want and their reports for both there and Throop are very good even though they are not currently very regular (given by one of the bailiffs who is on both venues virtually every day).
I'll be on Throop tomorrow, regardless of the heavy frost out there tonight and rain tomorrow. Trotting for chub with plenty of maggot fished as fine as you dare (20/22 hook, single/double red with regular and constant loose feed). Plenty of chub showing throughout the fishery averaging close on 5lbs and a good chance of a 6 or two.
Kevin's book is a classic, but I'm biased!