We booked them in groups of 4 so they are cheap. We are on the early train, but that is so we can be in the pub at 11am. I think the 4 sights are priced at £48, or you can get deal for 2 of you at £35.
UB,
No problem with going early
Are those still available or do you have book well in advance? I think my mate got ones like that when we went up to Barnsley - where abouts did you buy 'em?
You need to book them. Best bet is to go on to www.midlandmainline.co.uk and see what is available. I booked the foursite that we are using up last week. The only train you can get back from Nottingham is the 1930, but there are a few in the morning that will get you to Lincoln in time. We are on the 0755, but that is so we can get more time in the pub.