The raid was carried out in the early hours of Wednesday
at Securitas, in Vale Road, Tonbridge, by at least six men who tied up
15 staff members.
The manager was abducted after being pulled over in his car by what
he thought was an unmarked police vehicle.
The Bank of England confirmed the scale of the raid - one of Europe's
biggest.
A Securitas spokesman said "a substantial amount of money running
into millions of pounds" had been taken.
He said the exact figure would only be known once a complete audit of
the site had been carried out.
The kidnapping of the manager took place at about 1830 GMT on
Tuesday.
He was in his silver Nissan Almera on the northbound carriageway of
the A249, just past the Three Squirrels public house near Stockbury,
when he was pulled over by what he believed was a police vehicle.
He was spoken to by a passenger wearing a high visibility jacket and
a police-style hat.
Thinking they were genuine police officers, he got into the
kidnappers' vehicle where he was handcuffed.
At the same time, the man's wife and young son were taken from their
home in Herne Bay after two men claiming to be police officers said he
had been involved in an accident.
The depot manager was transferred to a white van, tied up at
gunpoint, and then driven to another location where he was told to
co-operate or his family would be in danger.
At about 0100 GMT on Wednesday, he was taken by car to the Securitas
depot and the raid was carried out.
The balaclava-clad robbers, some of whom had handguns, left at about
0215 GMT.
The staff who had been tied up managed to raise the alarm about an
hour later - police officers found them with the manager and his family.
They were all shocked but unhurt and police said they were now
recovering from the ordeal.
Securitas spokesman Tony Benson said: "Members of our staff have had
inflicted on them the most terrible and traumatic experience.
"The fact that no-one has been physically injured should not mask the
brutality of this crime and we are all committed to working with the
police to catch those responsible and see justice brought to bear."
Det Supt Paul Gladstone said: "This was a traumatic ordeal for the
manager and his family and for all of the staff.
"This was clearly a robbery that was planned in detail over time.
"A very substantial sum of money running into millions of pounds has
been stolen and we are determined to bring the robbers to justice."
Police are appealing for information from anyone who may have seen
the manager's silver Nissan, or a Volvo or similar vehicle meeting up
with a white van.
They also want to trace a 7.5 tonne truck which was used in the
robbery itself.
In December 2004 a £26.4m raid at the Northern Bank's Belfast
headquarters became the biggest cash heist in UK history.
Source: BBC
