Can't believe some of the nonsense that I've just read on this thread.
He currently works 2 days of 9 am to 6 pm immediately followed by 2 days of 6 pm to 9 am = 48 hour week. He then has 4 days off.
What they ae trying to do is make them work 2 days of 8 am to 8 pm immediately followed by 2 days of 8 pm to 8 am = 48 hours.
Problem is that, despite a lot of negotiating, they are having these new hours arbitrarily imposed on them whether they like it or not, and that is why they are taking industrial action.
I am very proud of him having joined the fire service relatively recently and some of the rubbish that has been directed at firefighters on this thread is, frankly, both misplaced and disgraceful!
You should be proud and he will have my support.