The Mandarin Duck originates from South East Asia. They were introduced into the UK as part of wildfowl collections in stately homes, but a number escaped from captivity and began to breed in the wild, establishing small feral populations around the country. The majority of these are in Southern England, but populations also occur in other parts of the country.
Female 
Male
These were photographed at the London Wetland centre.
Pete's Favourite Things 
https://heartlandofengland.wordpress.com/hither-green-to-lullingstone-kent/
Where were the Mandarin pictures taken?
https://binged.it/2OSvDet
chislehurst common I think