thank you all i'd forgotten about amour all (we have it over here!) i'll give that a go first

JMCD what was the cost of the replacement bellows if you dont mind me asking?

looking at the way the hinge is bent it looks like the camera was droped while folded and it fallen on the edge of the extension
rail pushing one side up when i've taken care of the day job i'll have a closer look and report back