The latest Grand Designs on Channel 4 sees Kevin McCloud visit Marlow where a couple are struggling to build the first floating house by the River Thames.
The location is the lock island reached only by a footbridge .
The site faces south so the new building, replacing a single storey house, is not seen from the Thames Path which here is on the left bank and turning inland to avoid the lock ahead.
Marlow experienced severe flooding this year. Next time the house should rise with the water level.
The prototype being considered downstream at flood-hit Bourne End.