Received a phone call from Home Serve yesterday who are working together with United Utilities and I was offered plumbing and drains cover for 50p a month! There is no excess and covers repairs up to £4000. Also offers unlimited call outs. I asked if this offer was for certain customers only but told it is available through Home Serve website so worth visiting the site and checking it out.
12 month contract after which the price will rise but can be cancelled at any time with no cancellation fees!