This year's event has caused uproar due to protests and the death of three horses.
The monarch is pictured standing with two of her fell ponies.
The un-stable service prevented MPs from making it to Westminster for the swearing in of Parliament.
In one of the most disadvantaged inner-city neighbourhoods in the country, a community project is working to transform the lives of young people – using horses. The Ebony Horse Club was founded by Ros Spearing in Loughborough Junction, with the club offering children from the area a sanctuary from urban life whilst teaching them the value of hard work, patience and working with others.
“We were going to take the kittens but decided that was probably too much."
All in the name of science.