VAR has to check every goal as a matter of course, don't they? Usually that means a ten minute wait to see if they can find a technicality or loophole in the rules which will allow them to disallow it, but this time they seem to have got a shock when the linesman raised his flag, timidly and hesitantly, to give offside. But this time VAR did its job and called the ref over because they couldn't see anything wrong. The ref didn't take more than a cursory look, which seemed to support his view, and gave the goal. A simple and correct decision made complicated by a linesman who wilted under pressure.