The Environment Agency (EA) says that more than £3.5 million in fines were given last year, a rise of almost £1 million on 2005.

The waste industry overtook the water sector to be the biggest offender. Average fines were £11,800 but the EA claims the penalties are too lenient.

A spokeswoman said:

"The law is there to protect our environment and so businesses and individuals who think they can cut corners best watch out - we won't tolerate it.

"Waste cheats for example make money from their crimes, pollute our environment and damage the legitimate, law-abiding businesses. So the penalties need to reflect the seriousness of the crime."