Rebellion

So here some more general context to the rising of the North. We have essentially a mix of reason as to why thing happen, most of them having to do with protestantism of the crown while the local lord are catholic, but it also goes along with a centralising government against more feudal lord. At the same time you have the duke of northfolk seeking to get wed to Mary Stuart. Henry effectively an agent of that centralisation (he himself having no ties whatsoever to the region, but he is getting appointee to the matters by the central authority in London). I very much doubt that Henry had any sort of conflicting loyalty here, in fact the suppressing of the rebellion pretty much get brutal. Though most account actually put his force at numerical disadvantage.