The visible leak could have been caused by a number of factors.
These include old or weak pipes, natural wear and tear, temperature changes or changes in pressure on the pipes.
According to Thames Water, over 95 per cent of its leaks are never seen by customers because “they’re often smaller, underground and harder to find.”
It claims to fix a leak as quickly as possible by locating it, assessing it, planning its repair and then repairing it.
A leak is also present from a Google Street View image of the drains from 2016.
A Thames Water spokesperson said: “We know it’s not acceptable to be losing so much precious water and we’re doing something about it.
“It’s not going to be quick, but we’re making progress and we’ve met our target for the last three years to reduce leaks by 10 per cent.
“Our aim is to reduce our leakage by 20 per cent between 2020 and 2025.”
“We have 160 repair teams working tirelessly to fix leaks with activity taking place seven days a week and over 280 people working round the clock.
“And mainly overnight to detect leaks not yet appearing at ground level.
“We are repairing over 1,100 leaks per week – whether they are visible or hidden below ground.
“We prioritise repair work to ensure we focus on the bigger leaks first and importantly those affecting service to customers.
“We also have an extensive capital programme to help us fix more leaks in the future.
“In the next three years we will spend over £55million installing dynamic pressure management helping to modulate pressure across our network for varying demands, helping reduce leakage.
“And in the next three years we will spend close to £200million on replacing water mains.”