just found this - will try and find out more info. Also -
this, particularly the attached section
Access to MOD Training Areas in Surrey
The MOD owns around 4000ha of training area land within Surrey. The Four main areas are centred around Pirbright Firing range, Ash Firing range and the open training areas at Hankley and Elstead and Camberley (Sandhurst) part of which is in Berkshire)
All of these sites are open heathland and woodland identified as access land and declared excepted land due to the overriding military byelaws. The level of access is however different on all four sites.
All areas are open for access under the terms and conditions of the local military byelaws.( Displayed at all major access points to the training areas) In summary these allow for access on foot for a in formal open air recreation. This does not include the use of motor vehicles, horses or cycles away from public rights of way.
Pirbright Ranges
Pirbright range danger area (RDA) is ring fenced and out of bounds due to high level of unexploded ordnance on the area as a result of 100years of use as military range for a wide range of weapons. The land around the ranges and out side of the out of bounds area is used for minor military training and is open to the public for managed access at all times.
Ash Ranges.
The range danger area (RDA) is ring fenced and out of bounds to the public when the red flags are flying indicating that he ranges are operational and it dangerous to enter the RDA. In effect creating an out of bounds area 7days week between 07.30 and 16.30 approx 48 weeks of the year. Details of times when the ranges are not operational can be obtained from the range office on a daily basis. When the flags are taken down each day live firing stops and the area is open for full managed public access controlled within the terms of the Byelaws. There are few public rights of way within the Ash Area.
Hankley and Elstead
A dry training area or non live firing, part registered common. This site although used for training on a regular basis is open for permitted managed public access at all times. It has a number of public rights of way crossing the site and of course these remain open at all times. Public access and military use fit side by side. This access is assisted by the MOD warden patrolling the site and educating the public on how to behave on MOD sites. The local population are the prime users of the site. This has resulted in a good relationship being developed between the military and the public with mutual respect on both sides.
The MoD publishes a guide to walks on the MOD Land this features a specific walk across Elstead Common.
Camberley
Barossa Training area situated to the rear of Sandhurst Military Academy has both a dry training area open the public for managed access and a live firing Range which is ring fenced and out of bounds to the public at al times .
The managed access to all these sites has been in place since the late 1970's and allows the general public full and unrestricted access, but does retain the right of the MOD to restrict access if it interferes with any military training activities both live firing and dry training (Non live firing) activities.
The safety of visitors to all MOD sites is off course extremely important to the MOD. All sites are clearly marked as MOD training Areas at all major access points and the public are warned not to touch any suspicion objects. The majority of these areas have been open to the public for informal recreation for many years and a culture of acceptance from both parties has developed with the local communities. However as the population in Surrey ever increases the public pressure on the use of these has in places had a detrimental effect on military training usually resulting in the disturbance of planned exercises. This is a factor military units have to take in to account when planning exercises to ensure the public are asked to stay away from certain areas at any one time.
The areas are some of the only large areas of open Landscape open to the public for recreation in Surrey. The MOD is fully committed to sharing these sites with the public as much as possible. The sites are also important sites for there lowland heathland ecology. The MOD is committed to managing these sites with a clear objective to getting the designated SSSI sites into favourable condition by the 2010.Public access does play a role in this particularly where the protection of nesting birds is highly important. Defence Estates along with Surrey wildlife Trust as our liceneced conservation grazing tenant will continue to manage the estate for its valuable ecology. This will, include a programme of public awareness of the environmental importance of these sites. And actions which can help persevere the importance of the sites for example by keeping dogs under control during the bird nesting season.
Management issues arising from the use of the training area by the public include rubbish dumping , fires , joy riding, illegal use by motorcycles, unauthorised use by horse riders and cyclists, construction of mountain bike courses and jumps, illegal access from private property, car parking etc . All issues which the managers of the estate deal with on a daily basis.
The MOD as the owner and manager of these sites within Surrey are committed to providing for managed public access when ever possible. In return we ask the public to respect the need of the military to train and to be aware of and respect the valuable contribution these sites make to the diversity of the country side in the UK.