Stuart wrote:

Sounds like ******** doesn't it.

Quite. The only change (AFAIK) is that since 2004 immersion heaters
have to be fitted with a separate latching overheat thermostat.
Background reading he
http://www.cibse.org/index.cfm?actio...92&TopSecID=16

There are immersion heater elements to buy and fit yourself he
http://www.toolstation.com/shop/Plum...ing/d20/sd2708
(Always go for the long-life type as the cost difference is trivial.)

--
Andy