[Sideband]

It can happen at this time of the year. I'm no expert on propagation but I think it's called 'Sporadic E' and it's due to the layers that make up our atmosphere. These vary in height and thus can affect how far certain radio transmissions can travel. Very often here in Croydon I can receive French and Dutch FM stations at certain times and under exceptional conditions I have received a German one. Any interference is usually intermittent or 'sporadic'.

Not noticed anything here at home yet but it is more likely to happen on the car radio. One of the local stations I listen to has actually had poorer recption recently probably caused by the high pressure.