A fatberg the length of two Wembley Stadium football pitches has been found blocking a sewer in Whitechapel, east London.

The 250-metre long solid mass of wet wipes, nappies, fat and oil, weighs the same as 11 double-decker buses.

It is thought to be one of the biggest fatbergs ever found and it is around 10 times larger than the bus-sized fatberg found in a sewer in Kingston-upon-Thames in 2013.

The fatberg is around the length of two Wembley Stadium football pitches (Thames Water)

“This fatberg is up there with the biggest we’ve ever seen. It’s a total monster and taking a lot of manpower and machinery to remove as it’s set hard," Thames Water’s head of waste networks, Matt Rimmer, said.

“It’s basically like trying to break up concrete. It’s frustrating as these situations are totally avoidable and caused by fat, oil and grease being washed down sinks and wipes flushed down the loo.”

Thames Water engineers have said it will take them three-weeks to clear the mass.

An eight-man crew are using high-powered jet hoses to break up the fatberg (Thames Water)

Work started this week, with an eight-man crew using high-powered jet hoses to break up the fatberg before sucking it out with tankers.

It is then taken away for disposal at a recycling site in Stratford.

Mr Rimmer added:“We check our sewers routinely but these things can build up really quickly and cause big problems with flooding, as the waste gets blocked.