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High Security Rim Nightlatches - Standard Nightlatches - British Standard Nightlatches - Cheap Nightlatches
Replacement Nightlatches:

Locks And Safes have a large range of replacement nightlatches to suit your door. The best nightlatches to buy are the British Standard Nightlatch Range.
A rim nightlatch (Yale type) on its own is not sufficient. Your door should also be fitted preferably with a 5 lever mortice deadlock, though insurance companies will accept a rim automatic deadlock; both must be to British Standard 3621 or the equivalent European Standard EN12209

Having The Right Locks Fitted Pays!

Not having the right locks fitted to your door can cost you big to put right as most insurers today will void your claim by not having the up to date locks fitted.
Important Info:
Nightlatches come in two sizes one is 40mm and the other is 60mm to find out what type yours is just measure from the edge of the door (lock side) to the centre off the cylinder need help Click Here: How To Measure A Replacement Night Latch.