According to the BBC, the MoD didn't seem too bothered by the images... it was the local MP who got all flustered. As far as I'm aware the location of that base is not particularly secret. My cousin lives right next to it and I have a funny feeling I've even seen it signposted when I've been to visit.
Alright then, the terrorists just have to go hire a guy with a camera phone now. OH NOES! They blew their budget on the camera phone guy, and now they can't afford to make a fertilizer bomb.
Good job, another terrorist plot dismantled.