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Can I fit the Wiser Radiator Thermostats to these TRV valves? I think Wiser require M30 1.5mm valves and I suspect I have Comap M28 1.5mm type. I think I have Westherm 6 TRV's, but I am not sure. Do I need the following adapters? I hope not given the extra cost...

I have purchased a Drayton Wiser 1 to replace my existing Drayton LP811 programmer with a wired thermostat. I have an Alpha CD25C combi boiler single system. I am confused by the installation instructions, since it initially just says: "If there is an existing wired thermostat connected via...