THE collapse of an underground sewer could mean that the railway line between Billericay and Southend has to close.Thousands of gallons of waste are being pumped out of the underground channel but at the moment the full extent of the damage is unknown.A major collapse could force Network Rail to shut the line, which connects Shenfield to Southend via Billericay and Wickford.Sewage is being pumped out 24 hours a day through a manhole in the garden at the rear of a property in Charity Farm...
