30 January 1937, Butlin turned his business into a limited company "Butlin's Ltd.". Butlin took the decision to form the company as a means to raise finance for his new camps. On 8 February 1937 the company published its prospectus ahead of a public sale of shares. When the shares became available, they sold out entirely in five minutes. World War II years With the outbreak of WWII, the Clacton and Skegness camps were requisitioned by the War Office for use as training camps. The ministry needed further camps, and contracted Butlin to build them. Butlin agreed, on the condition that he could purchase the sites when the war was over, to use as holiday camps. The ministry agreed, and Filey (1945), Pwllheli and Ayr (both in 1947), opened after the war. As Butlin was dealing with other sites, he asked his business competitor, Harry Warner, to complete the construction of Filey. Butlin had purchased his first hotel in 1939, the Thatched Barn in Borehamwood, Hertfordshire. Like his camps, it was requisitioned (this time by the Special Operations Executive (SOE)) before he could develop it. During the war years, a number of Butlin's camps were used as Royal Navy shore establishments. Skegness became , a training establishment for petty officers; Pwllheli became HMS Glendower, and Ayr became HMS Scotia. Filey became RAF Hunmanby Moor and Clacton, after being considered for use as a prisoner of war camp, was later used as a training site for the Pioneer Corps. Butlin was recruited by the Ministry of Supply and asked to look at the causes of low morale amongst the workers in Britain's munitions factories. His first stop was at the Royal Ordnance Factory, Chorley, where he found that the camouflaged huts and barbed wire fences used to house workers gave them the feeling of being interned. Using the knowledge and experience he had gained in setting up his holiday camps, Butlin was able to devise activities and systems to boost morale, which led to his appointment as Director General of Hostels. In this position, Butlin introduced games and entertainment similar to those used in his holiday camps. These included: whist drives, amateur dramatics, theatrical productions and cinema. In 1943, he encouraged workers to continue taking their holiday entitlement but to do so at home, arranging various travelling fairs to visit towns on their "holiday week". Butlin's appointment to this role gave