Good experience with Corby for child renewal, all done online and took photo myself.
Applied 1st April but didn’t get id/photo confirmed by my contact till 12th April.
Promptly got a request to send the documents (previous passport) which I did next day, first class recorded delivery.
RM confirmed delivery and signed for on 14th, but Corby did not update as received until 20th April.
Application approved 20th
Passport printed 26th….they said I would get a notification when dispatched but actually I only got that by text message 20 minutes before the postman put it through the letter box today (28th)
**I saw some people on Facebook asking others what address to send documents to and people giving out any office address! Make sure you use the address in your email from HM passport office and use your specific reference number**