Passport renewal tracking | Expat Forum For People Moving Overseas And Living Abroad

I’m hoping to get some response since this post is the latest that I can find online but still a year old. I have sent in my son’s passport and my passport to HMPO over 2 months ago, but despite my explicit request to have my documents back altogether prior to application completion, they still failed and only returned separately. We are supposedly due to travel in less than a week. HMPO said they have sent the documents through Royal Mail to DHL. Has anyone experienced this before and know how long it will take to get to DHL? Then after that how long will DHL take to ship to US?