At peak times they have I think 3 787's, 2 or 3 757's and several 737's.
There will be room for everyone overnight and in the first wave, it gets complicated when aircraft are delayed in summer and pitch up to find someone else on their gate and holding for parking is not uncommon in peak times. Having said that, there's a load of planning involved, at no point will an an aircraft be given a slot and find there's literally nowhere to put it (!) Worst case is a return to mass bussing from the 130s and 140s.
http://www.ead.eurocontrol.int/pamsl..._2_EGKK_2-2_en