Don't bury your head in the sand: why not ask the CAA (if no-one here can give a definitive reply)?
The last thing you want is to find that you were meant to send in paperwork (plus dosh probably), and have been flying illegally for the past N years: they will stomp on your head then!
I'm nowhere near first renewal, and it'll be JAR not NPPL, so I have the answers (on another thread somewhere).