There was nothing wrong with them, they were just looking a little sad and needed a good drink. I used another of my bargain buys, brought at the end of last year from the garden centre, to give them a boost. It's called Top Defence, and I think it's mainly used when transplanting plants, but it said it could be used at any time a plant was stressed and I thought these guys needed a boost.
So after a good drink, a tonic, and a trim I think they were a bargain way to prettify the house.
Mind you, it wasn't until I had finishing tidying them up that I looked them up online and realised I should have worn gloves. They are primula Obconica, which apparently is also known as the Poison primrose because of the effect it has on those with sensitive skin (causes irritation) on contact. Oh dear, good job I'm obviously not a sensitive soul!