It’s been just 3 weeks so far for me… I sent the full certificate for my son but the short version for myself, even though I have had a British passport for more than 35 years myself they still wanted my birth certificate. The advisor said it was to prove I am British, even though I was born here and they have this documented already… it seems there’s a little bit of “luck of the draw” regarding what they want from us …
Thank you for your response and I hope they sort their error for you asap!!!