I only phoned NSDC a couple of days ago, and today the banks at White Lion Meadow are clear of litter - that's what I call service. As long as nobody takes it into their heads to scarify the area, as happened last year!
Latrines show the voles are marking their territory ready for breeding. The banks are punctuated every yard or so with these runs, sort of 'chutes' into the water for an emergency exit. Just watched a vole now using the run pictured above.