An elderly couple, who both suffer from dementia, have had their life savings stolen in a "heartless" artifice burglary.
Detectives in Ealing have released an image of a man they want to question in relation to what has been described as a "despicable crime".
On April 24 at around 10am, the elderly couple - both aged in their 80s - received a knock at their door from two men claiming to be from their bank.
The men walked into the house, stood in the hallway and told the victims that they needed their bank cards and PIN numbers.
The suspects became threatening and the victims complied, still thinking the men were from their bank.
A short time later the couple's lifesavings were withdrawn from Barclays Bank, Ealing Broadway.
The suspects then made off towards west Ealing in a grey, new-shape Audi.
Detective Constable Richard Thomas, Ealing CID, said: "The victims are emotionally upset and are wrongly blaming themselves for this incident.
"This is a despicable crime for which I would like to trace the suspects and put them behind bars.
"I urge anyone who recognises the man in the image, or has information, to contact me as a matter of urgency so others do not fall foul of these heartless criminals."
Anyone with information is asked to contact Ealing CID on 101 quoting reference CRIS 2510022/15. Alternatively, contact Crimestoppers anonymously on 0800 555 111 or at www.crimestoppers-uk.org.