Today Steve Brown reveals how plastic rubbish found on beaches is being turned into kayaks that clean up our seas. Gillian Burke goes oyster fishing in Cornwall and Chris Packham meets author Philip Hoare who thinks we should all take a daily dip in the sea.

Today the programme comes from Kent where Steve Brown makes a jaw-dropping discovery of shark teeth on the beach. And never mind icebergs – the UK has some of the biggest fatbergs in the world! But how bad are they for the arteries of our seas? Plus the programme soars high over Mull with Sea eagles and Chris Packham meets a photographer who believes the UK has the best marine life in the world.