Police investigating the £53m Securitas depot robbery in Kent say up to £7m was found in a raid at a vehicle repair yard in south-east London.
Police continue searching the grounds of Elderden Farm
Most of the banknotes stolen 10 days ago in Tonbridge in the UK's biggest cash robbery are still missing.
A 43-year-old man arrested in the raid on ENR Cars at Graves industrial estate in Welling has been released on police bail, police said on Saturday.
On Saturday, a 28-year-old man was held in the Bexley area over the robbery.
A small amount of money was also found at Elderden Farm in Staplehurst, Kent.
Remanded in custody
Police continued to search the grounds of the farm on Saturday.
Four men and a woman have appeared in court on charges in connection with the heist.
They have all been remanded in custody until 13 March, when they are due to appear before Maidstone Crown Court.
Thursday's raid in Welling was a joint operation involving officers from Kent and the Metropolitan Police.
The owner of ENR Cars, known only as Nigel, said he had sub-let half the yard to someone else and the news had left him "totally dumbfounded".
Speaking to the BBC from Spain, where he and his family are setting up home, he said he had contacted Kent Police and was waiting for them to call him back.
"I've got nothing to hide - it's absolutely nothing to do with me," he said.
He added he was due to return to the UK on 25 March, but was prepared to come back earlier to talk to the police.
The Welling site is searched in connection with the £53m robbery
There were also reports on Friday that officers were searching a car showroom on the A26 Tonbridge Road in the village of Wateringbury, just outside Maidstone.
However, Kent Police refused to comment.
Two men appeared before magistrates in Maidstone on Friday.
Lea John Rusha, 33, from Lambersart Close, Tunbridge Wells, Kent and Jetmir Bucpapa, 24, of Hadlow Road, Tonbridge, Kent, were both accused of conspiracy to commit robbery.
Two men and a woman appeared in court on Thursday on charges linked to the raid.
John Fowler, 60, a car salesman of Elderden Farm, Staplehurst, is accused of conspiracy to rob, handling stolen goods and kidnapping depot manager Colin Dixon, his wife and young son.
Stuart Royle, 47, of no fixed abode, is charged with conspiracy to rob, while Kim Shackleton, 38, of Allen Street, Maidstone, faces a charge of handling stolen goods.
The raid, Britain's biggest cash robbery, happened at the Securitas depot in Tonbridge, Kent, in the early hours of 22 February.