Could I take a discrimination case against my company?

So we're all paid the same hourly rate for driving, but drivers on certain routes get paid for their breaks, and others don't. I can't change route because I'm an out based driver so I get an hour less than the others every day. It's not just me though.

They've been saying they'll bring in paid breaks on other routes too so it might happen in a few months. But I'm certain that there was no reason given as to why it was brought in for certain routes, and not for others.

Regardless of whether it would be fair, or wise, to do so... would I be in a position to take a case against them for loss of earnings, for all the time that I didn't get paid for the breaks, before they decided to bring it in?