Confused the hell out of me too when I flew out of there back home yesterday
The old free bit is now an express drop off and pick up which costs £1 for up to 20 mins
The new free bit is the medium stay car park which is free for 15 minutes and according to the airport is a 3 minute walk...bit longer when weighed down with luggage, avoiding hitting cars, moving cars and kerbs, only space I could get was practically at the Britannia
I'm just gonna pay the £1 next time to save the hassle...most likely the plan by the airport