Panic rooms for the Royals cost £1.2m

Terrorism-proof rooms have been installed at Buckingham Palace and Windsor Castle after a security review in the wake of the 11 September attacks, according to a report in The Sunday Times.

Terrorism-proof rooms have been installed at Buckingham Palace and Windsor Castle after a security review in the wake of the 11 September attacks, according to a report in The Sunday Times.

The secure rooms, which reportedly cost £600,000 each, are encased in 18in steels walls and able to withstand bullets, bombs and poison gas.

They replace antiquated emergency rooms which have protected the Royal family for decades.

With a fire-retardant steel core made of reinforced metal and carbon fibre, the new rooms are so strong they could even be capable of withstanding a direct hit by a light aircraft.

A third panic room is expected to be built at the late Queen Mother's residence, Clarence House, which the Prince of Wales will move into once it is refurbished.

Buckingham Palace refused to comment on the reports last night or discuss the security arrangements of the royal household.