The fear of air attack from German bombers at the start of hostilities encouraged parents to send their children to safety. There were predictions of 4,000,000 civilian casualties in London alone, and, as early as 1922 - after the air threat from Zeppelins - Lord Balfour had spoken of 'unremitting bombardment of a kind that no other city has ever had to endure'.
The Government had stockpiled coffins, erected masses of barrage balloons and planned, at least in outline, for the mass evacuation of British cities before 1939. But it is now revealed that these plans were hopelessly flawed.
In the first place, the estimates of casualties were grossly over-exaggerated and the subsequent Government propaganda caused near panic rather than controlled movement. In addition, the man in charge of evacuation, Sir John Anderson, was a cold, inhuman character with little understanding of the emotional upheaval that might be created by evacuation.
The day of evacuation
For some children used to city life, the countryside proved to be a revelation
Most evacuees have a vivid recall of events on the day of their evacuation. The images are of busy train stations, shouting officials and sobbing mothers.
In London, the schoolchildren sang 'The Lambeth Walk'. Elsewhere there were choruses of 'Wish Me Luck as You Wave Me Goodbye'. For most it was 'like going on an adventure': a phrase that is still uppermost in the minds of evacuees 60 years on.
'We marched to Waterloo Station behind our head teacher carrying a banner with our school's name on it,' says James Roffey, founder of the Evacuees Reunion Association. 'We all thought it was a holiday, but the only thinilg we couldn't work out was why the women and girls were crying.'
For the newspapers the evacuation represented an irresistible human story. An upper-class Englishwoman, Mollie Panter-Downes, described the scene in her fortnightly piece for the New Yorker and remarked on the 'cheerful little cockneys who could hardly believe the luck that was sending them to the countryside'.
The stereotypical images were already forming in people's minds.
Parents gave instructions to their children: 'Don't complain,' 'Grin and bear it,' 'Look after your sister,' 'Write home as soon as you can.'
Broadly speaking the four-day official exodus worked surprisingly well. The real problems came in the reception areas where the Government had left arrangements for the children's arrival and care to local authorities, with little more than an injunction to do their best.
The result can only be described as a typically British wartime shamble. Hundreds of children arrived in the wrong area with insufficient rations. And, more worryingly, there were not enough homes in which to put them.
Twelve months earlier, the Government had surveyed available housing, but what they had not taken into account was the extent to which middle-class and well-to-do families would be making their own private arrangements. Consequently, those households who had previously offered to take in evacuees were now full.
Keeping control of the whole thing became a joyless task. 'The trains were coming in thick and fast,' says Geoffrey Barfoot who had been seconded from the town hall to act as a billeting officer in Weston Super Mare. 'It was soon obvious that we just didn't have the bed space.'