In reply to Paul F:
Thanks everyone, it's a Camp StarTech. The inner actually fell out a few weeks after I bought it. I complained at the shop (Snow and Rock, it's nearby!). They said, tough, that's what happens to helmets. I was new to climbing so accepted it.
Anyway it's always stayed on but now the padding on the inside has also come off. I looked at some photos of last time I used it and you can see the inner peeking out the front of the helmet. It's ok now if I strap it on very tight but not too comfy. It is 5 years old, so I don't think they will replace it FOC.
I'll ask about getting it repaired by the manufacturers. The glue also has a load of twigs and sand on it, so I don't think I can do it myself. Otherwise I may have to shell out for a new one.
On second thoughts maybe I am being a bit tight on this one. How long are helmets meant to last?
Cheers my dears