E&M or PPE ? Watch
I doubt he'll find himself on the Park Bench, either way. Though he might end end up going directly to jail, without even passing go on the way.
From what i'v read both courses offer exactly the same job prospects after wards, both containing economics and another respected subject. It would be down to interests really, if it was politics he's interested in then do PPE
PPE: More well known
A year of philosophy might be a bit of an issue if he's not interested in that subject. Not to mention it'd be difficult to get in without interest in and aptitude for all 3 subjects.
He could of course just apply to Univ and be considered for both.