New assault rifle for some units of the british army

[GeeRam]

What will happen to the Colt Canada L119 rifles currently in British service?

Given Colt Canada were given 2.8m to upgrade them to midlife update, L119A2 spec only 10 years ago, and given who they are issued to, I would imagine they would be staying in service until OSD....?

However, from what I've seen, the £90m order for these new L403A1's is initially only for 1,640 rifles, with an option to acquire a further 10,000 falling under a new £90m contract over the next decade.
So, maybe that initial 1640 will be to replace the L119A2's used by the various SF units, with the rest to be rolled out to all RM/Ranger/Para units later on?
Do the numbers of 11000 odd stack up to that though?
I'd bet that the L119A2 will remain in use with those currently using it (wonder how many L119A2's we have?) and the L403A1's will be on general issue to the rest of the RM/Ranger/Para's etc., to replace the L85's, as there will be a lot of commonality between the two anyway, which is why they are doing this.