Theo Chandler, six, showed he had a head for figures after correctly counting the number of fireworks in the office window of Goodfellows Estate Agents in Carshalton Beeches.

The sums paid off for Theo who won a family ticket to the Making of Harry Potter, Warner Bros. Studio Tour in London.

Theo not only one the ticket but also £100 for his school, Barrow Hedges School, Sutton. Vince Edwards sales manager at Goodfellows said: “The competition was fantastic with many local children coming into the office to try their luck and win the prize!”