Meet Catherine and Adrian - they have 2 young kids and live in Rotherhithe, just across the river from Canary Wharf.
Meet Sammy - their home - a 1955 US Army Tug Boat.
In this 5 minute documentary, Catherine and Adrian open up about life afloat and why they love the marina community in which they live.
What is the appeal of living on a boat in the centre of one of the world's greatest cities? Is it magical, crazy or simply normal?
Is there an alternative and viable way of bringing up a family a stone's throw from London's financial district?