Daylight Saving: What do I need to do when Daylight Saving starts or ends?

For the Topfield TF7100HDPVRt

Change the time and timezone information under the setup of the PVR (check your manual on how to do this) and then manually force an update of new guide information. You should now see the guide at the correct times. One thing to note is that any timers that were setup before changing the timezone information will probably be at the wrong time and will need to be edited (or cancelled and re-setup) to have the correct start time.