I haven't fished Stanborough lake for quite a few years Peter, but it always used to be an easy Carp and Bream water when we used to be members a few years ago so it's news to me that it has now become a hard water.
NB. I remember watching Ivan Marks fish two opens on Stanborough lake; once he was fishing the first swim next to the boatyard fence which always used to be one of the easiest Carp swims on the lake, and the second time he was fishing on the river side of the lake but about half way down, and it goes without saying Ivan had a few Carp on both occasions amongst a good bag of Bream.
It's a pity Stanborough lake has become such a hard Carp water these days, I didn't realise.
Keith.