I assume that with a progammable thermostat (eg.
http://www.screwfix.com/app/sfd/cat/...7585&ts=55860# or
http://www.screwfix.com/app/sfd/cat/...9276&ts=55860# ) it is
possible to leave the central heating timer switched on all the time and
just to control boiler activity using one of these. Horstmann or Danfoss,
any comments as to which is better?