Hi I did the same as you, when I asked the post office how long they are taking I was told 3 weeks, also this was written on the receipt. I sent my daughters off on the 23rd March and they signed for it on the 1st and marked as received on the 2nd of April. I am still in the stage of documents received, haven’t even entered the processing stage. I’m going to have to do the 2 week upgrade next week as I really don’t hold out on them sorting it in time for us going away on the 15th may. What office has yours gone to? Soon as I get any updates I will post back. Fingers crossed.