Why is there even "unless" there? Is UK not going to recognise the state of Palestine if Israel does agree to the two state solution?

I bet "unless" is just a way to back out, later when Israel agrees to ceasefire, Kid Starver will say the process is ongoing but taking longer than anticipated, then Israel will break the "ceasefire" the very same day, and it will all fizzle out and end with nothing, as it did with absolutely every Starver's promise.