If it’s back in a week all fine, two or three weeks likewise. May not get renewed in time but I will be granted an extension as it is now in the processing system. But if it is one day after expiry date then it’s a whole new world of hurt, no extension, no legal authorisation to hold guns / rifles and application become not a renewal but a grant. Bottom of pile, low priority and many months before I can hope to get new certificates.
We seem now to be beholden to the GP ‘s who are unaccountable in this regard. They can charge what they want and return the proforma when they want. It’s a mess.
I think they only issue an extension if your application is submitted 12 weeks before expiry