Im just going off of what ive gathered from Ree and Fosspatents.If MS get a favourable decision and they find out before the expiry date those extra days waiting are irrelevant really, they can get abk do grant them an extension, assuming abk still want to fight it out with the CMA.
Even with an FTC appeal extending things, i can see them pushing abk for an extension. They seem to just want some favourable outcome to drag this further.