One victim said that the scammers had stolen their savings.
They explained: “I felt really, really low after this happened. I made the mistake and now I will have to pay for it.
“This money was my savings.
“I would encourage anyone who is the victim of a crime like this to contact the police and help prevent this happening.”
The Met conducted a three-month undercover operation to catch the scammers preying on the elderly using CCTV, eyewitness accounts, phone monitoring, and more to trace the ring.
The investigation began after a report from a pensioner in Hampstead, and soon, detectives had linked that crime to other reports across London and tracked down those responsible.
Khan pleaded guilty on 12 March to conspiracy to steal and is due to be sentenced on 9 May at Snaresbrook Crown Court.
Other members of the ring, Bradley Goode, 23, and Hanad Mohamed, 20, also pleaded guilty to conspiracy to steal.
Mohamed is due to be sentenced alongside Khan in May, while Goode has already been handed a community order of 120 hours unpaid work.
Abi Wood, CEO, Age UK London, said: “This is a terrible case of scamming older people who are so often targeted for this type of crime.
“In this case, the work of the Met Police officers has been vital to prevent any more people becoming victims and we are pleased to see that the criminals were caught.
“Our advice to older people is to say no. Never disclose your bank details either over the phone or to someone in person who asks for it and never hand over your bank cards.
“If you are unsure, check with your bank or someone you know before doing anything.
“For doorstep scams, keep all doors locked when answering the door as people can work together.
“Use a chain on the door, especially if you are not expecting anyone, ask for ID, and ask them to wait while you check with their organisation.
“A genuine person would not mind you doing this. If you feel unsafe or pressured, contact family, a friend, or the police.”
