Mine has a while to go but end of next year will see me have to apply again. In the past I have used the Post Office Service which is worth the money I think as they check the application and take responsibility for delivery .
I will loath to lose my Mauve EU for a pathetic Blue one, it looked good on the old cardboard. Another Brexit lie of course since we could have had Blue passports at any time inside the EU as one or two countries did.
Not sure what the value of a UK passport is anymore either