Well, the article does explore numerous possibilities, including quotes from various RN personnel.
They have a lot of time...and I am relatively sure that the RN will have selected an appropriate missiles (or missiles) and insured that they are integrated with the Mk-41 system they intend for the Type 26 FFGs.
The article talks about the Tomahawk, the Scalp, the Naval Strike Missile/Joint Strike Missile, and the LRASM.
Of course the Tomahawk is already integrated into the Mk-41, and the LRASM will be.
I believe it is safe to bet, with the amount of time they have for this, that the Type 26 will come out with a very decent ASM capability.  And apparently they intend both land attack and ant-shipping to be in the mix, which, of course the Mk 41 can handle.
Tomahawk IV and LRASM are naturals.
SCALP and NSM/JSM could easily be ready in the time frames we are speaking of.