Looks like he got a Master's in Modern History from Oxford before he became a comedian, so I would presume it's pretty solid.
https://www.oxfordmail.co.uk/news/11410511.pub-landlord-al-murray-shows-serious-side/
Murray graduated from St Edmund Hall with the degree of MA in Modern History. At Oxford he performed in the comedy group, the Oxford Revue in a show directed by Stewart Lee, before launching himself onto the comedy circuit.