- Video report by ITV News Royal Editor Chris Ship
There are two graves in St Patrick’s cemetery in East London that stand out.
They are bright white against a sea of grey stone.
There are the graves of two five-year-olds who lost their lives 100 years ago today.
This afternoon, a small crowd of relatives, historians and members of the local church gathered at these tiny white graves for a service.
They graves have been cleaned for today's commemoration.
The two children, Louise Acampora and Johnnie Brennan, were among 18 little souls killed when a German bomb crashed through the roof of their school in the middle of the day.
There were boys on the second floor of Upper North Street Primary, girls on the first floor and, on the ground floor, a class of infants.
It was the infant class in which they counted 16 of the 18 bodies. Most were just five years old.
The raid on 13 June 1917 was the first ever daylight raid by the Germans over the British Isles.
And what followed was a national outcry.
We think of air raids over London when we look back at the Second World War.
But the Germans had worked out how to drop bombs over London towards the end of the First World War.
And in the days which followed, public opinion turned sharply against any German, or anything remotely Germanic.
Which – at that time – included Britain’s Royal Family.
The bombing of Upper North Street Primary added to a major crisis facing the Queen’s grandfather, King George V.
At that time, King George and his family went by the name created when Queen Victoria married her cousin Prince Albert: Saxe-Coburg-Gotha.
And to make it worse for King George, the plane which dropped the bomb, killing children as they were sitting in class, had the same name: a Gotha bomber.
Just five weeks after the air raid in East London and four weeks after 15 little souls had been laid to rest in a mass grave nearby, Buckingham Palace announced the Royal Family would, henceforth, be known as the House of Windsor.
An overnight name change which replaced every German reference and title with something British.
On 17 July 1917, King George V issued a Royal Proclamation:
Later this week, the Queen and Duke of Edinburgh will go to the school in Poplar – which is now called Mayflower Primary.
The Queen will be accompanied by the German Ambassador to Britain. Things have changed a lot in a hundred years.
But in East London today, they took time to remember 18 children who went to school one Wednesday morning and never came home.