Untrained mariner Timothy Spall has spent a fortune on technology for his new challenge - the unpredictable Irish Sea - as he and his wife continue their mini-odyssey around Britain. From Cardiff they head west to Milford Haven at the end of the River Severn and all seems well. However, Captain Spall bungles his departure to Fishguard and ends up going nowhere at full speed due to the turning tides. Shattered and in the dark of night, they eventually find Fishguard. They also visit Aberystwyth, a return home for his wife Shane, and then the 'discovery' of the trip so far, Porthdinllaen. Here they find the most beautiful cove they've ever seen, a beach pub and a ride in a lifeboat to see the stunning Welsh coastline in its full glory. 'Mr and Mrs Vasco de Gama' are back on their travels in this seductive and heartwarming series.

Untrained mariner Timothy Spall has spent a fortune on technology for his new challenge - the unpredictable Irish Sea - as he and his wife continue their mini-odyssey around Britain. Entering Liverpool means navigating their first big city since leaving London, but reaching dry land can be daunting in a small boat when dodging tankers and ferries. It's even more difficult when the coastguard sends him round in circles because he's on the wrong side of the marker buoys. On his way to Glasson Dock in Lancashire, Tim is tricked again by another buoy. Misunderstanding his sea chart results in an unplanned dropped anchor in the middle of the Irish Sea, where they have to wait all night before he can enter the port. Their next destination finds them in the company of royalty; Piel Island near Barrow-in-Furness has the unusual honour of having its own king and queen, a tradition which goes back centuries.

Sea adventurers Timothy Spall and his wife Shane take their barge to three different countries and the Isle of Man. From Whitehaven, where Spall learns about the pirate John Paul Jones, they steam over to Douglas to visit his son, actor Rafe Spall, who is there to work on BBC2's The Shadow Line. Next they visit a city Tim loves dearly, Belfast, and a special pub he says is 'the finest drinking establishment in the English-speaking world'. Finally, it's across to Portpatrick and Scotland, as they clock up some serious nautical mileage in their circumnavigation of the British Isles.

As summer comes to a close, Timothy Spall's trip around the coast of his beloved Britain reaches the halfway mark. He encounters several Scottish ports and islands, but mostly in the famous Scottish misty drizzle. Before the weather worsens he winds his way through the Scottish western islands and takes his barge Princess Matilda back to her roots by venturing up the Caledonian Canal, a short cut from the west of Scotland to the east which sets up next year's trip down the east coast and back home to London. This year Timothy and his wife Shane have travelled further than in any other of their previous six years at sea. All they need is somewhere to moor up for winter.