Correct, it is as Northerner states, although the exact timespan of the event is still not completely firmed up it is likely to be 1230 or 1300-1800 both days. Headliner will be Johnny Collins, making an appearance mid-afternoon on the Sunday (tbc), but others appearing (though not all confirmed as yet) include the mighty Young 'uns and Jim Bainbridge, and some of the names are indeed listed in the ad in the current edition of Folk Roundabout (This is a true value-for-money publication giving all the club etc listings for the north-east (UK) along with loads of reviews and other information.) The mag's editor is the organiser of the Nature's World Festival, in fact, and it's a popular and accessible little event now in its 16th year!
Perhaps the thread should be renamed Nature's World Festival, Acklam, Middlesbrough (UK) - July 2008 ?