So I found 5 camelias at Dobies garden centre for £1 each. Bargain!
They looked a bit Bill Withered, but I decided to have a gamble on them and grow them on.
Polystyrene chunks at the bottom of the new pots and then a 50/50 mix of perlite and ericaceous soil, topped with pure ericaceous soil! That should give the Camelias a decent chance of kicking on.
I’ll post an update if they survive!