How the 'world's worst sniffer dog' is helping the NHS

Meet Dexter who was sacked from his drug sniffer job because he was "too sociable".

He used to be part of the Metropolitan Police's anti-drug squad but after failing their training programme they found him a new role as a "wellbeing dog".

Now, he helps officers relax following tough assignments and has been visiting hospitals to offer NHS staff a wellbeing break during the pandemic.