Crucial negotiations will begin in Brussels tomorrow to try to find a compromise over the EU's controversial Working Time Directive.
You may remember that MEPs - led by Labour's very own Stephen Hughes - voted against a Council deal to keep the UK's opt-out from the EU's 48-hour week, back in December.
Now, the negotiations are at what's called the 'conciliation' stage - where MEPs and the Council have to come up with a compromise.
In theory, this stage can last for up to six weeks, but rumour has it that tomorrow's negotiations are likely to be the end of the story - and if not, it's likely there will be only one other meeting, in around two weeks' time. Crucially, the UK Government - which is in favour of the keeping the opt-out - does not have a veto over whatever is decided at the 'conciliation' state.
(You may or may not find comfort from the fact that we are being represented by Lord Mandelson - who, as we were reminded this morning - needs to keep the EU sweet if he is to continue receiving his generous EU payoff.)
With more than 3 million people working more than 48 hours a week, and plenty of others no doubt in favour of keeping the option to choose to do so, this is a huge deal.
Imagine if the House of Commons was set to vote tomorrow on whether or not to bring in a 48-hour maximum working week? The press would rightly be all over it like a rash. Imagine if the Government was proposing to put something through Parliament that would cost £8 billion a year - as we've calculated the loss of the opt-out would cost the economy? Ditto.
Instead, few people even seem to realise this is happening. And little wonder - the negotiations are going on behind closed doors in Brussels, and it is typically difficult to find out what any of the positions are or even when the actual decision will be made. Could be tomorrow, could be in a fortnight - could be in six weeks. Who knows?
In conversations with the British Steelwork Association (BCSA), which is leading a campaign to keep the opt-out*, civil servants apparently said that the Government was looking for all the evidence it can get to help strengthen its hand in the negotiations with EU partners.
So, we asked 10 UK workers from across the country and across industry to write and tell us why they think the loss of the opt-out would be a terrible idea, both for them personally, and for the industry or businesses they work for. See here to read what they have to say:
*NB - the BSCA, after polling than 1,000 workers, taken from 30 companies all over the UK, found a staggering 90% signed a petition in favour of retaining the opt-out.