Clipston ROC Post 12 – (Bedford 10 Cluster)

Explored with Winch It InOpened – November 1959
Closed – September 1991

This is the last of the Bedford 10 Cluster we explored with Sutton Bassett 11 and Cold Overton 10 (Master)

It’s seriously been burned out for several years now and there are definate signs of drug use (home made bongs etc) and serious partying in this post. Amongst the carnage underground the cupboard still exists but the doors have been torn off, the desk is still fixed to the wall and miscellaneous items such as grease are scattered about, there were also a couple of battery boxes in one corner.

Nearly all of the polystyrene tiles have melted in the heat but it does look like perhaps the fire burnt itself out due to lack of oxygen?

The surrounding area is also quite trashed with broken glass bottles widespread on the surface, the new green gate that was fitted on the nearby aircraft observation post has been torn off and it looks like someone sleeps in there now.

It’s sad to see a site like this that’s supposedly maintained by English Heritage as part of their Battle of Naseby project in Naseby, Sulby, Sibbertoft and Clipston so heavily trashed.

Cold Overton ROC Post 10 (Master – Bedford 10 Cluster)

Explored with Winch It In

Opened – April 1959
Closed – September 1991

This ROC Post has declined steadlily over the years, the top of the vents have been off for a long while and some time ago an attempt to chop away at the concrete on top of the hatch has left a nasty mess.

Below ground many items seem to have been stolen, even since April of this year, sadly there will be nothing left in this post soon. We visited this post as part of an objective to take in all three of the Bedford 10 Cluster with Sutton Bassett 11 and Clipston 12 making up the rest of the cluster.

As suggested by the cluster name this ROC Post came under ROC Group HQ No 7 Bedford

Sutton Bassett ROC Post 11 (Bedford 10 Cluster) – Part 2

Here are the underground shots that were taken on a second visit to this ROC Post – Explored with Winch It In.


RAF Market Harborough Battle HQ

Explored with Winch It In

This wasn’t the main objective of the day (a list of ROC Posts were) and I’m not big on WW2 Defences but it would have been rude to drive past this so we stopped for a quick nosey.

Site: RAF Market Harborough.

Opened – 1943
Closed – 1947

Units stationed at RAF Market Harborough:

No 1683 (Bomber) Defence Training Flt (3 Feb – 1 Aug  1944)
No 92 Group (1944)
No 26 Air Crew Holding Unit (21 Aug 1945 – 18 Sep 1946)
No 113 Storage Sub-site, No 273 Maintenance Unit (Feb 1946 – 5 Oct 1949)

RAF Market Harborough was mainly used as an Operational Training Unit throughout it’s active days with No. 14 OTU flying Vickers Wellingtons, Airspeed AS.10 Oxfords, Hawker Hurricanes and some Curtiss P-40 Tomahawks from No.1683 Bomber Defence Training Flight.

Today very little of the main airfield survives as a lot of the site has now been demolished to make way for a Business Park.

The control tower and all of the technical site was demolished to make way for HMP Gartree which opened in 1965.

The Battle Headquarters is a TYPE 11008/41, the room layout is pretty much the same
in all of these and this has the usual OP, Main Office, PBX Room, Messenger Room and Toilet.

Some internal fittings remain and despite the farmers attempt at burying the HQ all rooms are still accessible, as are the hatches, albeit with some ‘interesting’ floor levels. The main Escape Hatch still has an intact ladder with a clear entry to the main rooms and the other escape hatch is also still open but partially buried. The wooden door to the Elsan Chemical toilet is still in place too.

Despite evidence of some flooding the entire Battle HQ was damp but free of standing water.

Sutton Bassett ROC Post 11 (Bedford 10 Cluster)

The Royal Observer Corps (ROC) was a civil defence organisation operating in the United Kingdom between 29 October 1925 and 31 December 1995, when the Corps’ civilian volunteers were stood down.Comprised mainly of civilian spare-time volunteers, ROC personnel wore a Royal Air Force (RAF) style uniform and latterly came under the administrative control of RAF Strike Command and the operational control of the Home Office.

Originally there were some 200 observation posts throughout the country and their role was to provide visual detection, identification, tracking and reporting of aircraft over Great Britain during the World Wars. Early Observation Posts were often crude and un-fortified but during the war many were rebuilt from brick and had sandbag defences.

On 12 May 1945 when the German Luftwaffe had ceased combat operations the ROC stood down, however it wasn’t long before the threat of Cold War arose and the ROC were reinstated.

In 1957, the United Kingdom Warning and Monitoring Organisation (UKWMO) was established under Home Office control to provide essential information about impending nuclear attacks to both civilian and military authorities.So that the ROC could work with the new type of threat the old monitoring posts were replaced with something that had protection from nuclear blasts.

Between 1958 and 1968 a countrywide building programme resulted in a network of 1,563 underground monitoring posts, approximately eight miles apart, distributed throughout England, Scotland, Wales and Northern Ireland, at an estimated cost of almost £5,000 each.The bunkers were built by digging a 25 feet deep hole, placing a reinforced concrete bunker in the hole and then burying it under compacted soil.A single hatch to the surface was the only entrance/exit with a 20 ft vertical ladder that lead to an underground chamber 7ft x 16ft x 7ft high.Posts were typically grouped together in threes or sometimes four, to form a cluster. One post in each cluster was a master post and could communicate directly back to ROC Control using a Tele-Talk device connected to ROC Group HQ and the Carrier Warning Receiver.

No telephones were provided. Each ROC Post was manned by 2 to 3 people who ate and slept in very primitive conditions as there was no electricity or running water in the bunkers, toilet facilities were by way of an Elsan Chemical Toilet located at one end of the bunker.

The ROC Post had a variety of external equipment fitted as standard:Bomb Power Indicator (BPI) – This would register the pressure wave from a nuclear explosion passing over it and the results were read on a dial inside the ROC Post.

Ground Zero Indicator (GZI)– Basically a crude pinhole camera that could ‘photograph’ the fireball of a nuclear explosion.
Radiac Meter – Used to count radioactive particles
Fixed Survey Meter (FSM)– Replaced the Radiac Meters and used to detect nuclear fallout. (The FSM could be safely operated without leaving the bunker)
Cross section of a ROC Post

After bomb a detonation, the direction, elevation and spot size of the fireball and reading of the pressure wave on the BPI would be passed to ROC Group HQ using the Tele-Talk unit or Radio. Group HQ would use the direction information from two or more posts to determine the exact point of detonation by using triangulation.

The end of the cold war and advances in technology eventually brought the end of the ROC and the monitoring post and group control personnel were stood down on 30 September 1991.

Amazingly hundreds and hundreds of these ROC Posts still exist (although some have been demolished) and even more amazing is that many still have the original equipment and supplies intact inside, it seems many ROC volunteers just climbed up the hatch and left everything where it was. Sadly there are also many existing ROC Posts that have been burnt out or heavily vandalised by kids.

A brighter end to this story is the emergence of ROC posts being restored for posterity, perhaps the most famous of these is 23 Post Skelmorlie in Ayrshire, Scotland. 23 Post has been totally restored and is open as a museum on certain days in the year

This is Sutton Bassett Post 11, part of the Bedford 10 Cluster.

10 Post (Cold Overton) was the Master Post with Sutton Bassett 11 and Clipston 12 making up the cluster.