i shiver at the thought of 'reasonable' additional hours - for you it may mean being allowed to go an hour over your limit - for me it means its the end of the month and you are already way out of hours - but they will now work you on 'reaonable additional hours' - you will probably be ROSTERED to your maximum hour limit each month and then given standby days in addition - and any delays just add on as part of the 'reasonable' bit.
Sorry but that sucks. I know what they are like now - i cant imagine they will treat the ability to work you into the ground 'reasonably'