Horrifying footage shows thousands of gallons of water contaminated by raw sewage flowing into the sea - yards from children enjoying a last splash of the half-term holiday. A surfer captured the images off the popular Trevaunance Cove, St. Agnes, Cornwall. The usually stunning turquoise waters, revered by locals and tourists alike, turned brown as the flow poured into the cove. The filmer, who wishes to remain anonymous, pans the video around to show the scale of the sewage problem, which runs hundreds of feet out into the sea. They said: "Sadly the events in the video are on the increase, happening more often with less rainfall, rather than reducing. "As a regular water user I can testify to this. It did improve in the late 90's / early 2000s after pressure from organisations such Surfers Against Sewage. "But it has been on the increase again over the last five to ten years. "Sadly, this is becoming an increasingly common occurrence, not just here, but all around the country's coastline and rivers." South West Water has been approached for comment.