Hi. So after all the fuss from the fire brigades about the metal consumer units to prevent fires. I went to a house today that the owners were going to rent out to give it a quick check over. Whilst there I mentioned the current rules about smoke alarms and that it would be a good idea to replace the 2 battery ones. He told me that he had had the local fire brigade out to have a look, and that they had put them up, no mention of mains power or interlinking. You would think that if they were giving advice to home owners they would be aware of the current building standard?