Honeywell Smartfit replacement zone valve advice please

12 Jan 2018
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United Kingdom
Evening all..
I attended a customer's home today to install a Nest thermostat, when I took a look inside the airing cupboard I found the Honeywell Smart fit system which I believe uses extra low voltage zone valves, cylinder stat and programmer which is not directly compatible with the Nest system.
My customer wants to continue with the Nest install and therefore needs 230v zone valves and a 230v cylinder stat and wiring centre (not a problem)

My question is - Are the Smartfit valve bodies compatible with a mains voltage actuator head such as the Honeywell V4043?

Many thanks
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