I needed a new lock quickly for an elderly person living on their own. I checked local and online suppliers without great success until I found lockandkey. I particularly wanted a euro profile lock with an internal thumb turn and they have an extensive range of good quality locks in all sizes at reasonable prices and can supply additional keys with the new lock.
The website was easy to use and contained a useful hint about fixing the lock into a upvc door. The lock and additional keys arrived very promptly and were easily installed.
Definitely recommended.