Hello
@SLee
To reassure you, and anyone else reading the thread.
There was a similar question a while ago from someone taking a Conductor position, so I'll refer you to my response to that here:
Apologies if this sounds like a stupid question! I have accepted a conductor role and am completing my new entrant paperwork. There is a form to opt out of the working time directive and I am unsure as to whether to sign this. I am new to the railway and would be appreciative of a little...
www.railforums.co.uk
Emphasis on the "you will not be thought of unfavourablably to you remain opted in."
This isn't some security guard agency where your basic week is 48 hours, and they'd like you to cover more shifts often, on top. It's the railway, and even with committed Sunday overtime (if your TOC deals with Sundays that way), you could still CHOOSE to work a fair amount of overtime on top and still not break the Working Time Directive.
If you were in danger of breaking it, they'd have to tell you and start turning you down for overtime - in which case, if you're that desperate/motivated you choose to opt out.
I'm a Driver, haven't opted out, and have worked over a day a week's overtime on average in a year (including Sundays - outside the working week where I am) and haven't triggered it. And I'm not an overtime king.
Best of luck with your new job.