In the summer of 1940, Charles Ogilvy was one of the group of pilots, famously described after the battle by Prime Minister Winston Churchill as 'The Few', who, with their Spitfires and Hurricanes, were all that stood between Britain and the Nazis.
However when his daughter Susan visited the monument with her family in 2006 – a year after it was unveiled on the Victoria Embankment overlooking the River Thames – she noticed her father's name was not among those of 2,936 airmen who took part in the Battle of Britain.
That sparked a four-year-long hunt to compile enough information to make the case for his name to be included and her efforts were rewarded this week when she proudly witnessed the name of her late RAF squadron leader father being added to the memorial.
Mrs Ogilvy, 67, of Henley-on-Thames, Oxfordshire, told reporters: "I am grateful that my father's name has been added and that he will be honoured along with all those other young men who fought for their country. My father became a squadron leader and although he never talked about the war, it is right that his name appears on the memorial as it is something for our family to be proud of."
Sqn Ldr Ogilvy died of cancer 15 years ago, aged 79. But it was only the subsequent death of his wife that prompted his daughter to look through his medals and discover that among them was the rare clasp awarded only to those who had flown in the Battle of Britain.
The next step was to hire a professional researcher who trawled the operational records of her father's former squadron, now held at Kew Public Records Office in London.
That was when Mrs Ogilvy found out her dad's records had been lost. However, using his own personal flying log books she was able to prove that his name did belong alongside those of all the other heroes who have had their names inscribed on the monument.
Although Sqn Ldr Ogilvy joined 610 Squadron in October 1940, just weeks before the end of the four-month battle, the 24-year-old Spitfire pilot flew two operational sorties that month, which qualified him for the clasp.
Mrs Ogilvy added: "My father was a very modest person and would have thought 'what a fuss'.

"He never talked about anything to do with the war. He died without anyone knowing anything about this, and it must have been a very difficult time for a lot of young men.
"I think he deserves to have his name there and I am very proud to have done this for him."
It was Edward McManus who compiled the original list of names to be added to the bronze monument.
"As time went by after the monument was unveiled, there were several approaches to say that we had made mistakes, but none were substantiated," he said.
"That was until Mrs Ogilvy got in touch. We are delighted to be able to honour the bravery of Sqn Ldr Ogilvy in this way."
Sqn Ldr Ogilvy also took part in humanitarian operations over the Netherlands, dropping vital food supplies to starving Dutch civilians.
Sqn Ldr Ogilvy also served as a flying instructor at RAF Cranwell in Lincolnshire, before returning to a career in the insurance business after the war.
He had set up home in Walton-on-the-Hill, Surrey, in 1960.
The cost of having his name added to the Battle of Britain memorial was paid by Westminster City Council and its transport contractors, FM Conway.
Westminster City Council also held a reception at The Royal Air Force Club after Monday's ceremony.