It had been seen on and off all day and some photographers got some good shots this evening.
I walked the length of the bushes tonight. There were plenty of robins and wrens, but the only warbler activity was with a tit flock by the feeders at the Budge screen and a couple of chiffs by the 'Mike Carr Path' (as it is now known). Otherwise the bushes were quiet.
I probably won't have time to get down there tomorrow, which is a pity, as there must be a yellow-brow somewhere.