Took the children to Shrewsbury on the train (bus to Oldham Mumps, train to Victoria, tram to Picadilly, train to Shrewsbury). They were very good, and it was much easier than I thought, although I am very grateful to several people who helped with the pushchair, and were patient when I got off the train at Shrewsbury in a rush and a fluster, because of not realising that it was going to be Shrewsbury next.  Had quite a nice time, actually: I think Sam likes going on a train and looking out of the window, (lots of sheep and cows, some horses, he spotted a tractor, and a lot of trains at Crewe, which fortunately we were only passing through) and I am looking forward to taking them both places by public transport when they are older.