But if he turns to look at his screen or, perhaps, scribble out a prescription a rather more surprising hairstyle emerges - a glorious, wavy, cascading mane that has earned him a place in next month's Mulletfest in Australia.
Bush - it really is his name - had always sported a short back and sides but began growing out his hair during a Covid lockdown. Unlike most people, he decided to keep going.
He said he can get away with the "business at the front, party at the back" haircut because the soldiers he works with at an army camp in south-west England find it amusing. "The soldiers are mainly in their 20s and find the mullet funny.
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