Nine out of 10 London restaurants and takeaways are failing to prevent the food , grease and oil that can cause “ fatbergs ” in sewers from entering drains , according to research by utility company Thames Water . On the capital ’s Whitechapel Road , where a 130-tonne fatberg was discovered last week , no outlet had a working grease trap . Fatbergs , which cost utility companies millions of pounds per year , occur when unflushable items congeal with fats and oils inside drains . Outlets lacking systems for disposing of fat can be prosecuted again and may face prosecution if changes have not been implemented .
Nine out of 10 London restaurants and takeaways are failing to prevent the food, grease and oil that can cause “fatbergs” in sewers from entering drains, according to research by utility company Thames Water. On the capital’s Whitechapel Road, where a 130-tonne fatberg was discovered last month, no outlet had a working grease trap. Fatbergs, which cost water companies millions of pounds per year, occur when unflushable items congeal with fats and oils inside pipes. Outlets lacking systems for disposing of fat will be visited again and may face prosecution if changes have not been implemented.