Mountford Hall was packed out for Liverpool's first taste of #MonsterMashUp This image appears in the gallery:#MonsterMashUp 2016: ALL The Photos From Last Halloween's BIGGEST Party 59. Mountford Hall was packed out for Liverpool's first taste of #MonsterMashUp (Pic: PA) 77 images See the full gallery: #MonsterMashUp 2016: ALL The Photos From Last Halloween's BIGGEST Party