RAF Foulsham – A Leader in Electronic Warfare. (Part 3)

In Part 2, we reached a milestone in the life of Foulsham as it was on the brink of changing hands once more. As the new Group takes over new challenges are about to be faced, and FIDO, the fog dispersal system is desperately needed to counter the appalling weather.

By the 25th November, the move had been completed, and both 514 and 1678 HCU had now departed the airfield. With Foulsham now empty, it would undergo yet another change of ownership, this time to 100 Group, the specialists in electronic warfare. This change of ownership would, as before, bring another two new units, 192 Sqn and a supporting training unit 1508 (Blind Approach Training) Flight.

100 Group was formed that November as 100 (Special Duties) Group under the Command of Air Commodore E.B. Addison CB, CBE with its headquarters at Radlett in Hertfordshire. The aim of the move was to place all the electronic units under one single command, thus unifying its aim and bringing together all the resources of the thinly spread units. One of the main aims of the Group was to provide ‘spoof’ operations, confusing the ground operators and radar controlled night fighters, thus spreading them over wider areas. This would in turn, it was hoped, reduce the number of casualties from RAF bombers and achieve better bombing results as a consequence.

Other duties of the Group would involve the jamming of radar and radio equipment used by German aircraft and ground stations, monitoring German airways and providing incorrect orders to German crews using native speaking RAF crewmen. The war had become a battle of science.

One of four T2 hangars.

Over November and December, airfields were taken over and aircraft supplied to the new Group. Squadrons were brought in to fill these sites and the Group grew from strength to strength.

A newly registered unit, 192 Sqn (formed a year before at RAF Gransden Lodge)  operating a mix of Wellingtons, Mosquitoes, Halifax IIs and more  recently, their newly acquired Halifax Vs, were transferred over to Foulsham, in one of the first moves to the airfield.

Formed through the renumbering of 1474 (Special Duties) Flight, 192 Sqn had been previously been monitoring the German Ruffian and Knickebein beams. In their new form they would monitor, amongst others, the western approaches to the Bay of Biscay, monitoring and recording night fighter channels.

However, the winter weather was up to its usual tricks, and it played havoc with initial flights. But despite this, within 48 hours of their arrival, 192 Sqn was classed as operational, and a memo to that effect was sent off to Headquarters 3 Group Bomber Command.

With no flying over the next three days due to the continuing bad weather, initial flights were able to begin on the 29th November, with three aircraft, all Wellingtons, performing Special Duties Flights over the Bay of Biscay. After landing at Davidstow Moor for refuelling, there was a major electrical fault at the airfield and the entire flare path and flying control facilities were put out of action. As a result, the three Wellingtons were grounded and unable to continue their flight home.

The weather continued to play havoc for the crews at Foulsham. A flight planned for a Mosquito and two Wellingtons on the 1st December had to be postponed and then finally cancelled. The next day, 2nd December 1943, three aircraft were ordered to fly to the Frisian Islands and the Dutch coast, but one had to return due to the pilot’s escape hatch blowing off, and a second overshot the runway on take off becoming bogged down in the mud. The aircraft was damaged but the crew were unhurt in the incident.

On December 7th, Foulsham officially became part of 100 Group and another unit No. 1473 (Radio Counter Measures) Flight also arrived here to assist with the ELINT (Electronic Intelligence) operations. By February 1944, it was decided to merge the Flight with 192 thus forming a ‘C’ Flight. With additional Mosquitoes and Ansons – the hardware inventory at Foulsham was now growing rapidly.

Much of December suffered the same fate as its preceding months however, poor weather rendering flying unsuitable, leaving many aircraft and their crews grounded for prolonged periods of time.

100 Group’s inaugural operation on the night of 16th / 17th December, did not however, go in their favour. On what has become known as ‘Black Thursday’ the RAF bomber force of over 480 aircraft, took heavy losses. These losses whilst high over occupied territory, were made far worse by poor weather which claimed some eight aircraft from 97 Squadron at RAF Bourn – one sixth of its strength,

The beginning of the new year, 1944, saw big changes not only in Bomber Command, but at Foulsham also. As the second phase of the ‘Battle of Berlin’ began, Stirling squadrons and now Halifax units were being pulled out of the front line bombing campaign; their shortcomings becoming all to obvious as losses in the types began to mount. The poor weather continued to cause misery across Britain’s airfields, rain and fog preventing large  continuous attacks on the German heartland.

The interminable fog was the driving force behind the new FIDO system now being installed at Foulsham. Bomber command had initially asked for eight airfields across the UK, but by the end of 1943 they were seeking twelve, and Foulsham (designated Station XXI) was identified as one suitable.

William Press were given the contract to install the system, and by mid February work had begun. Supplying the huge storage tanks was going to be a challenge though, and so a new siding was constructed at nearby Foulsham railway station. Its not known for sure whether the fuel was then piped the two mile distance to the airfield, or brought across in tankers, but whichever it was, it required a good deal of extra work.

At the airfield site, three storage tanks were assembled on Land at Low Farm, located at the northern end of the main runway. The much needed pump house and control point were also located here. Operators were kept on a 24 hr watch system, being billeted near to the equipment in two Nissen huts, one for officers and the other for ‘other ranks’.

One of the air raid shelters used around wartime airfields.

Initial plans were for a mile of runway to be lined with the Haigill MK IV burners, with intersecting burners placed in trenches across the two intersecting runways. The placing of these burners, well out of the way of moving aircraft, initially being a difficult challenge to overcome.

Operating the burners was a tedious and dangerous job. After opening the valves and allowing petrol to fill a pool through which the operator had to walk, a match was thrown into the pool and the poor ‘Erk’ had to then run as fast as he could and throw himself into a small indentation in the ground hoping the flames would pass over and not ignite the clothes he was wearing. Once the burn had been achieved and all aircraft were down safely, the system was shut down and allowed to cool. Once the pipes were cool enough to touch, some 72,000 holes along the length of the pipes adjoining the runway had to be cleaned out to prevent a build up of soot. It was perhaps, one of the most tedious but vital jobs, RAF personnel had to perform.

Before the system could be fully tested though, a bizarre accident happened that resulted in no crew injuries, but two badly damaged aircraft and a Senior Flying Control Officer being posted and demoted.

In the next part (4) Foulsham’s  appalling weather accounts for a bizarre accident. The arrival of a new and relatively unique aircraft brings excitement to the site and FIDO really comes into its own.

The entire story of Foulsham can be seen in Trail 22.