No, no idea I'm afraid. According to the Zooarch database, the body was spotted in Derbyshire & left to decay in August 1998. Somewhat similar to the condition 'Wrynose' found in deer & many other mammal species, but here it's not so much the nose that's awry, it's the sagittal crest.

Hi! I've seen a very similar situation with a badger skull in the past - it was likely caused by a damaged tooth, which led to preferential chewing on one side of the skull. Any mandible with this specimen, so see if it might be the same cause?