Owing to current home circumstances, I've only just reviewed some programmes recorded on 17/18 December. All programmes on a number of channels (BBC4, BBC2HD, CBS Justice, Talking Pictures and possibly more) were subject to continuous interference. I'm sorry, I can't give a start and end time for that interference. My transmitter is Waltham, and I live near to Edwalton in Nottinghamshire. I wonder if anybody in the nearby area who gets pictures from Waltham could comment. The reason for my concern is that paramedics attended my house at 23:30 on 17th leaving (without a patient, fortunately) at 02:00 on 18th. They spotted an odd trace on the ECG and wanted me to unplug a nearby lamp (that was off) thinking that was interfering with the leads. It may be that there was some very local interference from a nearby neighbour - but I've never seen that before. Is anybody aware of any "natural phenomenon" that could have caused interference on those days?