The A321 is no different to the 757, in terms of having two types within the fleet. Although the 737 and 757 are Boeing, they have very little, in common. If Jet2 feel the need for something bigger than the 738, they need the A321 or 737-900ER/9MAX. They have had the A321 wet-leased for quite a few years now and the 757s aren't getting any younger. With type-rated crews and maintenance seeking new opportunities at MAN, there seems no better time to acquire the expertise and integrate it into the company. Much like when Channel Express bought those Ansett 737s all those years ago.