i've been listening to a few early maiden live recordings this morning. his style could be fast and aggressive at times, almost punk.. and then at others subtle for example Strange World.
TheyCallMeVolume: The Prisoner has a rather funky intro beat doesn't it? I'm listening it to it as I write this and his playing reflects the different passages of the track well.
edit: A family friend had MS and it a big strain on their family, but it made it no easier when they passed away. RIP.