There does seem to be a lot of confusion over this, the AAIB report does seem rather at odds with what John Coward apparently told Sky News:
"The adrenaline kicked in when I realised I had to land the plane with absolutely no power at all. There are drills for a power failure at 30,000ft, when you have time to reset and restart engines, but there are no drills for this. As I approached the runway, I thought that this was going to be a catastrophic crash."
If an engine hangs and does not respond to acceleration demand, one way to reset it is to shutdown and relight. Maybe that's what the F/O meant.
The AAIB report does not go into any detail, so there is not necessarily any conflict between it and any statement the crew might make (though I'd rather they didn't talk to the media to be honest).