I've just completed an "out but not back 600", a DIY Perm finishing at York Station, as this has an easy regular train back over (well, under) the Pennines back to my start point. It would have worked brilliantly if I hadn't overlooked the fact that there was Racing at York and there was no way I was going to get on those overcrowded trains with my bike. I managed to get back home eventually using local stopping trains, one helpfully labelled as "Huddersfield via". It turned out that the via was Halifax, which is a long way round.