A quick look on FR24 LBA arrivals for tonight will also tell you that apart from G-JZBB due in from Antalya all the other B738's due in to Leeds tonight are aircraft that have been acquired as used aircraft. Only JZBB is one of the batch of B738 MG's that Jet2 has had from new. The B738MG's run from G-JZHJ to G-JZBS to my knowledge.