Thanks girls - have decided to overnight in Manchester. Still - will look these up for a break on way down - as it'll take over 4 hours to get to MCR. And then 4 hours the next day to reach South COast.
Low Sizergh Barn is about 5mins from the M6 at Jnt 36. There's a farm trail for running around and you can see cows being milked, if you're there at the right time. Might be there myself this week as we're going down to Yorkshire.