Personally, if I were in number 10, UK forces in afghanistan would be packing up already. I'm sure we could place a battalion of troops, a squadron of armour, a couple of ships and a few more jets at MPA
Indeed it is an excellent opportunity for us to remove ourselves from an operation that is costly in monetary and lives, with no clear end in sight.
We could wring our hands about wanting to help, but our forces are needed elsewhere to protect the UK. Start an immediate withdrawal and do so as fast as possible.
We can then send some GR4s and more Typhoons, troops and maybe some armour to the Falkland islands, once there it wouldn't cost as much as Afghanistan is costing, so we benefit again. Maybe we could send more submarines(ensure that they are spotted at more than one location at the same time) and perhaps a T45 with PAAMS capable of tracking and engaging many targets at once(well at least we can find out if it works, if not we can stop building the carriers it is designed to protect).
That should deter ideas any South American country or group of countries have about reclaiming something which was never theirs!
Meanwhile the rest of NATO can argue amongst themselves as to who is going to send more troops to Afghanistan.........