It arrived yesterday by courier. Yay! The whole process was much quicker than I expected. I was seriously worried as I stupidly booked a trip to the US for March 22, but only allowed four weeks for my passport to arrive. However, it did not take the stated six weeks that IPS gives on its website. I attribute this to using the post office's Check & Send service.
Here's the timeline:
Sep 2 - Applied for UK citizenship
Dec 10 - Received letter approving citizenship application and invitation to book ceremony
Feb 17 - Citizenship ceremony
Feb 19 - Sent in passport application via Check & Send at post office
Feb 26 - Received supporting documents back (US passport & naturalization certificate) and letter asking to book interview
Feb 27 - Interview (got lucky with a slot available the next day!)
Mar 4 - Passport arrived!
I can't believe that my UK immigration journey has finally come to an end. After so many years spent apart from my DH, then going through the spouse visa/ILR/citizenship process and forking out so much money, it's a wonderful feeling of relief to know that I'm finally done and we'll never have to worry about being separated again. Hooray!
Right, better get started on DH's Greencard app. now.