If you get pixelation, blocking, missing channels or EPG (electronic programme guide) information, when trying to watch digital Freeview TV then you may need a new aerial.

This would involve removing your existing aerial system where possible and replacing it. We would always recommend replacing the whole system with a new benchmarked aerial, benchmarked co-axial cable, galvanised bracket and alloy mast. This ensures problem-free Freeview TV for many years to come.

A reputable installer will always inspect your existing system first before proceeding with an installation. This is because your aerial system may just have a minor problem that is easily and cheaply rectified.

If you are in an area where you cannot get a good signal through an aerial without an excessively tall mast then Freesat is the best alternative option.

Freesat uses a small oval satellite dish (similar to the Sky minidish) to receive free TV channels, including HD (high definition) channels. There are more channels available than on Freeview and the HD channels mean you get the most out of a flatscreen TV without having to pay for SkyHD.

The "digital switchover" is the term used for the transition between analogue and digital TV broadcast.

At the moment both types of TV are being broadcast simultaneously but by 2012 the analogue broadcasts will be switched off and only digital channels will be available.

What this means in real terms is that by 2012 you will only be able to watch TV through your aerial with either an Integrated Digital Television (iDTV, basically a TV with a built-in digital Freeview tuner) or with a Freeview set-top box.

For reliable viewing of digital Freeview channels most properties will require a new aerial and cable, and in some areas almost every property will require a new aerial due to the way that the channels are broadcast.