Yep, they're breaking the law. Under the Road Traffic regulations recently put in place, you're required to take an UNINTERRUPTED 30 minute break before or at the 6 hour point in your shift, and if your shift goes on over 12 hours, again at that point. I drive trucks for a living, and these rules are a pain in the neck. And by that law, you can refuse to answer the radio for that 30 minutes, since you're not supposed to undertake work related activities during your break, and are also legally required to be able to "freely dispose of your time". I had a transport manager whine at me for being 45 mins late at a drop. He said I should have taken my break at the previous drop. I told him that being forced to sit in a cold, drafty waiting room on an uncomfortable chair was no break in my book. Stupid H&S rules...