I also processed my MM order today. We both have 21 days to send it and for them to inspect/sign off.
I will be sending mine on Saturday 17th at which point I hope to have the new one up and running.
They use RM Tracked 48 so even with delays they will likely receive within 5 days.
However no more RM strikes until the 30th now so should be normal service.
Thanks for clarifying, all the best.