Are you talking about Barton Court on Kennet?
Ive seen very very few grayling on the river?
But having said that Ive never fished grayling season on it??

In any case, I love it, apart from the very nice person who helped himself to my brand new travel greys missionary with g-lite reel from the rod rack, a few years ago!!! May he be struck with lightning whilst fishing with a stolen rod...

Anyway, its a lovely stretch of chalkstream