I have installed Hive but I want to improve the frost protection because there are lagged pipes in the loft which is much colder than the house. Does anyone see any reason why I should not connect the froststat across the 'live' and 'CH on' terminals on the Hive backplate? This should mean that the CH would come on when the froststat is activated regardless of the Hive setting and therefore protect the pipes in the loft. The CH would of course remain switched on until the temperature in the loft rose sufficiently to deactivate the froststat regardless of the Hive roomstat setting. There are radiator valves elsewhere and a bypass installed so presumably this should not cause a problem with the boiler or the heat levels inside the house.