Kevin McCloud revisits Andy and Nicky Bruce who were building an experimental amphibious house on a small island on the Thames in Buckinghamshire. They spent £1.2 million on one of the most ambitious Grand Designs ever, but the logistical headache of building on an island only accessible by a narrow footbridge soon became clear. Heavy machinery was swept away by the river, contractors were changed, and the site was hit by severe storms, causing delays and resulting in an unfinished and untested building. Kevin returns to find out what living on a regularly flooded piece of land is like, and whether the floating home performed when the river burst its banks in January 2015.