Pupils from St Saviour's & St Olave's School at Bricklayers Arms have reached the finals of a national competition testing young people's knowledge of consumer law, health, safety and finance.
"A huge congratulations to the St Saviour's and St Olave's team for making it to the finals of this year's Young Consumers of the Year competition," said Cllr Richard Livingstone, Southwark's cabinet member for community safety.
"This is the fourth time the school has made the finals, beating off rivals with their exceptional wealth of consumer knowledge.
"While the competition is a lot of fun, it is important that young people are aware of their responsibilities as consumers and go on to make sensible spending decisions in the future. I wish the team good luck in the nationals."
The Trading Standards Institute Young Consumers of the Year Competition allows teams of four 14-17 year olds to compete in a knockout consumer quiz.
The national final will be held in Harrogate on 2 July.
The quiz covers consumer law, food and health, safety and the environment, managing money and finance, credit and the European dimension.