I've though about challenging the length. But never done it because as far as I can guess DWP are very anti accepting that a younger person [daughter] has conditions that [being genetic] will not improve 'magically' [Oh how I wish as a parent, oh how she wishes and her husband that she was fit enough to even consider having children]. But when it is your Dad ie an older person I agree with BIS [who is a trained mod, I'm not] that you may well as well give it a go. Best of British with it, keep us posted if you can, Denby