The info is a bit confusing, but it did land!
As you can see there has been some renumbering going on. Probably has to do with the fact that Martinair themselves haven't been flying yet themselves yesterday evening and this flight was carried out by KLM operating under MP's number and name (MP is a daughter of KLM).
At the moment apparently a lot of flights of codeshare partners are being operated by KLM material instead of the planned codeshare airline. Has to do with KLM having more planes in the right places (especially for those departing at AMS).
Getting back to the UK from AMS is another thing, though. Today only 2 flights will depart AMS for the UK, one to Liverpool and one to Birmingham. All other UK-bound flights are cancelled. Not the greatest odds to get to the UK, allthough Tony has a major benefit over all of those that have been stranded from the beginning. Priority will be given to those on their way at the moment and/or with booked tickets for the following days. Those already waiting will be added next. That leaves Tony with a couple of hundred, perhaps thousands after them.