Norwegian Air has 787's on the books but not fifty in play for its Gatwick operations. Moving some 787's from other European Norwegian bases will not account for it ever expanding fleet of 787's. The Gatwick nod for Norwegian Air coming into its airport is a done deal. Now Norwegian will need 50 787's for filling its slots. Therefore, more Boeing 787 orders for 2016.
"Norwegian – currently Gatwick’s third largest airline – has announced ambitious plans to locate 50 Boeing 787 Dreamliners to serve global long haul destinations at an expanded Gatwick.