Okay, imagine you and your friends want to play a game where everyone gets the same amount of toys to play with. That's kind of like what socialism means - everyone gets the same opportunities and benefits.
A long time ago in the United Kingdom, some people felt that rich people had all the toys and poor people didn't have enough. They started a political movement called socialism to try to make things more fair. They wanted everyone to have the same access to healthcare, education, and other important things.
One of the earliest socialists in the UK was a man named Robert Owen. He ran a textile mill and tried to create a "utopian" society where everyone shared in the profits and had access to education and housing.
Later on, in the late 1800s and early 1900s, a political party called the Labour Party formed to represent workers and push for socialist policies. They wanted to make sure that working people were treated fairly and had a say in the decisions that affected their lives.
Over time, the Labour Party became more mainstream and focused on winning elections. But there were still some socialist thinkers and activists who continued to push for more radical ideas.
Today, there are still people in the UK who identify as socialists and believe in creating a more equal society. They might push for things like free healthcare or affordable housing, and they often criticize the current political system for not doing enough to help working people.