The first British martyr from Scotland originally? (5)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

Saint Alban was indeed the first English martyr. His entry in Collins goes on: He was beheaded by the Romans on the site on which St Alban’s Abbey now stands, for admitting his conversion to Christianity. The second part of the clue provides another way to the answer based on ALBA as the Scottish Gaelic name for Scotland (this has come up here a couple of times recently) so a person from Alba might at a pinch be said to be ALBAN. As for the Saint, despite the suggestion in the clue, he certainly didn’t come from Scotland and was actually a Roman citizen.