They are striking because, although we already provide a 24/7 emergency service and a 5 day a week elective service, hunt wants a 24/7 elective service. However, he can't magic up more doctors so is wanting the same amount of people to provide more cover. He is also failing to acknowledge that one of the main barriers to a 24/7 elective service is the support staff - doctors are already in the hospitals, even if you put more doctors in, you can't do anything without the clinic nurses and admin, the radiographers, the theatre nurses, odp's, secretaries and so on and so on. Which all costs money.
So hunt wants doctors to work more hours. Junior docs already work on average a 48 hour week, generally on a shift system (so when on call you work a 12 hr shift, because it is a shift you are not entitled to sleep breaks on a night shift)
back in the old days they used to work longer hours (but were entitled to sleep breaks if working 24 hrs) but this was deemed unsafe. Doctors were making mistakes cause they were exhausted, dying in car as they were falling asleep at the wheel on their way home and so on. It was decided that this wasn't safe so rules were put in place that said that hospitals couldn't force doctors to work these awful hours any more, to protect the patients and the doctors.
If hunt gets his way, these rules, put in place to protect the patients, will no longer stand. We will go back to the days of exhausted doctors who may make mistakes.
As for the antisocial hours bit...
The way junior doctors are paid is as follows - everyone gets a 'basic' pay - so if you were in a Monday to Friday 9-5 job with no on calls and an hour for lunch every day, you would just get basic pay.
The vast majority of doctors work a 48 hour week, so they need to get paid for these extra hours. How much they get paid is decided on by their banding supplement - so if most of your work is mon - fri 9-5 then you do a few evenings and maybe a weekend day here and there, your banding supplement will be lower than if you work every other weekend, have a few weekdays off and do loads of nights or twilights that finish at 4am with an unpredictable shift pattern.
You don't get to choose your shift pattern. I couldn't decide I want to do all the weekends and get more pay.
What hunt wants to do is increase basic pay a bit, but also increase the hours that are included in basic pay. So if you mainly work mon to fri 9 to 5 you will get a bit more money.
But almost none of us work those hours. My day shifts are half 7 to half 7. With the new contract, I would actually get paid less for the same hours.
But hunt also wants us to work more hours to provide a 24/7 elective service. Which he can't provide the infrastructure to support.
So in a nutshell, he wants to take away rules that were put in place to protect patients and make doctors work longer hours for less pay, but even if he does this he won't achieve what he is telling us he wants as we need more than just doctors to provide these service.