Despite these successes, two technological developments gradually started to make the old regional system untenable. The development of FM radio made it possible to fit a far greater number of channels into the spectrum without conflict and interference, which opened the possibility of more towns and cities having their own radio stations. The Midlands Region opened the BBC's first local radio station, BBC Radio Leicester, in 1967, and with many more of these planned, the relevance of the regional radio station broadcasting from the Welsh border to the North Sea was immediately cast into doubt.