A few words from Pope Paul VI at the canonization of the Ugandan martys,
“Who could have predicted to the famous African confessors and martyrs such as Cyprian, Felicity, Perpetua and – the greatest of all – Augustine, that we would one day add names so dear to us as Charles Lwanga and Matthias Mulumba Kalemba and their 20 companions? Nor must we forget those members of the Anglican Church who also died for the name of Christ.”
As for the Reformation martyrs in the UK, it is all too easy to see things in black and white - it really is a huge subject which requires some serious studying.