[nodrogd]

Like it or not, the analogue system was at the limit of it's development, indeed the system was never designed for colour and the colour subcarriers were inserted at the expense of picture quality. While I have gripes about DAB radio, the switch to DVB-T has endless benefits. Cross-colour/luminance, ghosting, grainy pictures, co-channel interference etc will all be a thing of the past. Yes, digital doesn't solve all the problems, but it's a lot better than what it replaces.

If you are very close to a main transmitter then the analogue channels may be fouling your reception, or the existing freeview signal may be swamping the receiver anyway. Don't fiddle too much until switchover starts, and if you still have problems try an indoor aerial (if you're not using one already).