At the time of the crash Leslie was just 20 years old -his birthday had been on 30th September. His mother's name was Jenny. She and her husband, Edward Cyril Laver, were Catholics and both came from struggling working-class families. However, it is not Edward Cyril Laver on Leslie's birth certificate but William Laver, a 'Draper's Carman' (delivery man).
Leslie was born at home, at 6 Calmington Road, in the poor densely built streets of south London, between Elephant and Castle and Peckham. The address was about half a mile from the original matrimonial home of 50 Carter Street - for whatever reason, Jenny had changed partners, perhaps to a brother or cousin of her husband's.
Later Jenny remarried and became a Mrs Crockett, but her last husband died prematurely.
The family now consisted of eight members, the mother Jenny, the three boys, Cyril, Walter (or Wally), and Leslie, and the four sisters, Marjorie, Irene, Jessie and Dorothy. The only work Jenny could get now was as a cleaner at the London theatres, and the family was extremely poor, yet they were all quite happy together. The children helped out by running errands or earning little sums of money. Brought up as Catholics, they all took turns to be the one who stayed behind on Sundays and cooked the breakfast for those returning from Communion.
Leslie grew up to be a good-looking lad, with fine features, dark brown hair, and strikingly beautiful grey-green eyes. He was very slight, just under five foot six in height, but his slimness of build would prove a great advantage when he became a rear gunner because of the appallingly cramped nature of the gun turret. Like his skipper who had also been brought up by a mother on her own, Leslie left school early, between fourteen and fifteen years of age, and began work as a milkman. Again as with Ted, the war would offer him chances otherwise not provided by his background.
Leslie joined the RAF just before his nineteenth birthday but was not called to the Volunteer Reserve until 22nd March, 1943 - he would only be in the RAF for 10 months. His first ambition had been to train as a pilot and his initial mustering is shown on his papers as Aircrafthand/Pilot.
However, at his own request he was regraded to Air Gunner after almost seven months of waiting to be called up. He had been told it would take even longer before he could commence training as a pilot and Leslie did not want to wait. His brother Wally told him he was mad, but Leslie said it would all take too long - he wanted to get into action as quickly as possible. Just over three weeks later, he commenced his training.