A World War Two veteran who celebrates his 100th birthday today has attributed his long life - to his 'Del Boy' upbringing.Jack Ransom - who still uses Facebook to keep in touch with pals - said he had been looking forward to celebrating his big day with a massive birthday party.But due to the coronavirus he was forced to spend it 'under lock and key' with wife Maddie, 89.Sprightly Jack, who learnt to use a computer aged 90 - the same age he married his third wife - is keeping in touch with his friends through social media during the lockdown in Largs, North Ayrshire.Born in Peckham, southeast London, on April 15 1920, Jack attributes the hardships of his early life to keeping him 'on the ball'.But he ended up moving to Scotland after