Before trying the final assault on the San Carlos's beach head we will try a risk mission. We know the zone where the carriers Hermes and Invincible are located. Use the Neptune recon planes and try to sink the carriers as fast as you can taking advantage of the surprise factor (in this war the argentinian planes used to get close to their objectives by flying a few meters above the sea to avoid being detected) or Sea Harriers will appear to defend the ships and our planes are not match for them. If you destroy all the targets (carriers) you will have won this scenario and in the next one, which is the assault on San Carlos, the british will not be able to use their air force. 
Good luck!

Note: Fictitional scenario.  
You can't deploy core units.