I've just dug out a long unused Hozelock AC1 automatic watering timer. The internal valve actuator seems to work, making the expected noise, but the valve only partially closes.
I can't see service details on the Hozelock site. I've posted a query but have not yet had confirmation that it has been accepted....ah, yes it has. Response in 3-5 working days.
I am wondering it the internals are easy to get at and no ping/fuckit traps for the unwary.
TIA
Dave R