http://www.dgsupplyline.co.uk/window-hardware/shootbolt-gearboxes/shootbolt-gearboxes/swish-shootbolt-gearbox-u-shaped-catch.html
If this is it then I think you'll be fitting an espag
The very same
....and it was way over £30 
so espag here we come. I don't mind what's fitted as long as it keeps the wind and the bugglers out. Although it is a first floor window and if they can find anything valuable it won't be mine Thanks to everyone for all the help.
