Central locking actuator started to fail on my Alpha Canopy. It still locked and unlocked but made a machine gun type sound when doing so.
Spoke to VW (as canopy was purchased through them from Caddy). VW rang Caddy and said to drop in to the Caddy workshop.

Have to give a big shout out to Caddy at Blacktown. Recognised problem, fixed under an hour on the spot as a warranty item without having to book it in.

Apparently it is a known issue with the original actuator being undersized.