He's really painted himself into a corner with this 'security' nonsense, hasn't he?
There's a reason why such matters are normally strictly confidential. But Harry has made his security arrangements, or lack thereof, into a news story.
There is no way RAVEC would want anything to happen to the King's son on their watch. They also have a very good record in what they do. If he's been told he will receive full security should there be a need, that's exactly what will happen. Now he's run up a massive legal bill, wasted public resources, and made what should be a highly confidential and sensitive matter into gossip fodder. He really does not know how to function in the real world.
Shifting the focus a little, does anyone else think a church service commemorating the anniversary of a sports event is strange? Yes, I know it's not just any sport event, but still it seems a bit much.