I found this on the website
Manchester Airport goes smoke free
All landside areas at Manchester Airport will be smoke free from Monday 14 May. As of this date, passengers wishing to smoke will be directed to use designated smoking areas outside the terminal buildings and will no longer be permitted to smoke inside the concourse areas.
However, once through the security channels and into the departure lounges, a designated smoking area in each terminal will remain in place until midnight 30 June.
In line with the new law, the whole airport will become smoke free on 1 July.
The new external smoking areas will be located outside Terminal 1 Arrivals, Terminal 2 Arrivals and Departures and Terminal 3 ground level doors.