L322 Light and heavy steering

Over the last couple of weeks I have noticed that the steering on my 2003 Vogue Diesel has felt really weird. When you are driving less than 30 miles per hour and turn or go round a corner you have to turn the wheel at least half - 3/4 turn before if feels as thought the sterring ha actually been engaged and the car physically moves, and on the motorway at around 50 -70mph the sterring feels really heavy and drifts slightly. I have checked my steering fluid and thats fine, just wondered if it could be the alighning of the wheels or if it is a bit more serous that that. I havent bumped or banged the wheels or anything s onot sure why its happening

Any ideas anyone?


Cheers

Power steering pump failure or loose drive belt, assuming that it uses hydraulic power steering and not electric. Know nothing about the L322 LOL