As far as I can find out, this is incorrect. The information I have is that they must have a warrant to enter, and they must be accompanied by a uniformed police officer.

Oooh yes, you're right. Looks like I fell for an UL. According to famed constitutional lawyer Richard Stilgoe, only Customs officers and officers of gas, electricity and water boards have that power -- and that was in the 70s, of course, so I don't know whether officers of deregulated power companies have any such power.

Peter