xm496 preservation society

The Bristol Britannia Civil and Military

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The Bristol Britannia was the world’s first long haul prop-jet airliner. It was developed as part of the drive to re-build Britain’s civil aviation industry after the Second World War when the focus had been on fighter and bomber production. In June, 1957 one made a record breaking non-stop flight from London to Vancouver on the western coast of North America in less than fifteen hours. This was only one of several record breaking achievements. On 19th December 1957 it was the first airliner to fly non-stop, scheduled, passenger services between London and New York, the Holy Grail of Post War air travel. (1) US airliners already flew the route but with a scheduled stop. Nearly a year later the Comet 4 joined the route. (2)

The Bristol Proteus engines which powered the Britannia were the first in the world to have “control-by-wire” using the Ultra Throttle system. This was later used on Concorde. Sadly, the Proteus is mostly remembered for icing problems, which were overcome.

As a long range military transport aircraft it could lift eighteen and a half tons over 4,000+ miles, carrying freight, or up to 53 stretchers with medical personnel and life support equipment or 115 passengers, in any combination. It was the Royal Air Force’s first strategic airlifter and a crucial component in the reshaping of Britain’s armed forces to meet the new threats of the Cold War. Its tasks included the rapid deployment, worldwide, of the then newly formed Army Strategic Reserve, and moving the V- Bomber Force, including the Vulcan, to its dispersal airfields.

Flown by 99 and 511 Squadrons, first at RAF Lyneham and later RAF Brize Norton, when the Britannia was withdrawn from service in 1975 as part of defence cuts, the Squadrons were stood down. In 2000, 99 Squadron was reformed to fly the Boeing C-17 Globemaster. The aircraft is different, the role is the same.
The following links are sources of further information.

(1) Inaugural Transatlantic Flight
(2) British Airways History

XM496 - Regulus

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The preservation of "The Whispering Giant" as the Britannia is affectionately known has been a labour of love for all the volunteers who have taken the XM496 from being close to scrap to a fully restored aircraft. For further details of the XM496 story please visit this page where you will find a fully documented history of its restoration.

The Preservation Society is registered with the Inland Revenue as Not for Profit Organisation. Much of it's work is carried out as a labour of love by the many helpers who freely donate their time.

The Bristol Britannia XM496 Preservation Society restrict it's self to the preservation of XM496 Britannia., The Society does however have links with many other organisations and charities. For further details please view our links page.

The XM496 Preservation Society like many others is always on the look out for helpers of all abilities, if you feel you can help then please contact us.

If you would like to sponsor the XM 496 Preservation Society and have a link on this web site then please contact us.

Open Days

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The XM496 is located in the heart of rural Gloucestershire at Cotswold Airport near Kemble.

The entrance to the airport is off the A433 Cirencester/Tetbury road and is signposted.

There is no access from the A429 Cirencester to Malmsbury Road.

Follow the sign to XM496 (Britannia) as indicated.

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Regular opening to the public is on the 1st and 3rd Sundays of every month with any additional days plus any changes (*) indicated below.



Summer Schedule (Open 11:00 to 16:00)
Sunday 20th  May
Sunday 3rd & 17th  June
Sunday 1st   15th   29th  July
Sunday 5th   19th   26th*  August
Bank Holiday Monday 27th  August*
Sunday 2nd   16th   30th  September
Sunday 7th & 21st  October 


Private Functions
1. ex-Britannia Association Members Day
Saturday 19th May 12:00 to 16:00

We can open by request at other times and would like at least two weeks notice if possble.
Contact: info@xm496.com

The XM496 Restoration Society has a facebook page. Please feel free to visit.

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