My elder daughter was in a similar position - 2:1 in English, but no career job (working for Morrisons at minimum wage).
She really, really wanted to do primary PGCE, did some teaching assistant work at our local school (where they absolutely loved her and said she was a born primary teacher), applied to all the local colleges/universities that offered it - and couldn't get a place. A year later she tried again - still no joy. And I know someone else who had exactly the same experience - she's working at Starbucks.
Apparently, the courses around here (West Yorkshire) are, massively oversubscribed - they get about 100 applications for every available place, very few of them "timewasters". She is mightily pissed off about it.
Funnily enough, I also have a friend who went back to Uni to do radiography - he got a 1st, and an immediate job.
Draw from all that what you will!
The thing with primary school is the obvious massive shortage of male primary school teachers, around 15% are male. The teaching unions are encouraging more males to go into the profession, so whether that would work in my favour i dont know.
Was your friend a mature student in radiography??