The barge is worth a look at, note the pole at 11 O'clock holding the one the sail hangs on at 10 O'clock. this enables the whole rigging - masts and sails - to be dropped very quickly and put up again when going under the bridges on the Thames
the thing that seems to have a narrow gauge scenic railway on it is to do with the electricity cable between the UK and Europe, it is the cable that travels along the big dipper on its journey to the sea bed and not little people.
here is the link to the rest of the photos from this evening's walk
here is the link to the books we put out in the bookshop today