Thanks for the replies,
Will investigate Hill Radnor further, I hadn't thought that they would have a particularly soft fleece, but having had a quick google see it is softer than some of the other hill breeds.
Hebridean are still on the HLS list Sally, so would be a possibility but I don't really want another very dark fleece, have also been told that the Zwartbles fleece is much nicer to spin than Hebridean, and I really want something with a lovely fleece, as it needs to be worthwhile to go through the hassle and expense of MV accreditation, which has previously but us off having another fibre breed as we couldn't find accreditated stock. Hoping the supplement would allow for the extra costs of MV accreditation but also need to check that it would still be allowable alongside the Zs which are not eligible.
Manx Loaghtans sound interesting, didn't realise they had such a nice fibre, will have to see if there are any in the area, will also look up the Portlands, think we may have to do some travelling to acquire one of these breeds!