When Greensward was purchased by Worthing Council in 1936 there was a very specific clause relating to the laying of a sewer system and mains drains. There was is even a pumping station to the left of Amberley Drive (refered to as ESS Mast on the land registry documents).
Under Goring Gap is an existing system designed to cater for hundreds of homes. Our forefathers planned this and worked hard to lay the infrastructure.