In July 2013 the MoD issued a contract award notice that detailed a mid life upgrade for the whole fleet of Cold Canada C8 carbines in service with the UK armed forces as the L119A1.
I covered it here
The upgrade has now been listed on the Colt Canada website and is said to include
- Custom integrated upper receiver
- Custom flash compensator
- Custom tan furniture
- Ambidextrous controls
- Custom buttstock
Custom everything it would seem!
H/T Sinlesssorrow from the M4Carbine forum