"Carys Jones, of Anglian Water, explains: "This offers a number of services to people who may need a bit more support, including password protection on their account. So if they do ever get a knock at the door with someone claiming to be from the 'water board', the person calling will need to provide the password the customer has set up through the scheme.
"We want all of our customers to feel safe in their own home which is why it's important they know what to expect from a real Anglian Water employee. If a customer has any doubts or can't remember making an appointment then it's best to say no and close the door – a genuine employee will be happy to come back at a different time or wait while you check they are who they say they are.
"All of our employees carry identification and will happily hand it to you while you check it.
Calling our Freephone number 03457 145 145 at any time of day will put you through to a member of our team who'll be able to describe the person to you and confirm they are a genuine employee."
http://www.northampton-news-hp.co.uk/new-war-waged-bogus-callers-Northants/story...Same info is also given out by Northamptonshire Police.
http://www.northants.police.uk/#!/News/28142Whilst seeking contact details of their media team i was surprised to find they use Premium Rate 0871 Numbers.
http://www.anglianwater.co.uk/about-us/media-centre.aspx