From ESA ExoMars portal:
10:48 CET: Flight Director confirms first burn of Breeze-M upper stage completed. Three more burns are needed to boost TGO on its way to Mars. Updates to follow through the afternoon.
10:43 CET: Proton 1st, 2nd and 3rd stage separations confirmed, fairing jettisoned; Breeze–M upper stage will now take over to provide additional boosts
10:31 CET: LIFTOFF!
10:26 CET: All teams at ESOC confirm GO for launch!
10:11 CET: The team at Baikonur are now disconnecting the power umbilical connection to the TGO. Spacecraft is now on internal power, drawing electricity from its batteries until ~12 hrs after launch
09:38 CET: Flight Director at ESOC conducts GO/NOGO roll call with the Mission Control Team. All positions report GO for launch!
09:21 CET: In Baikonur, the service gantry tower has started to roll back away from the rocket. This will take about 25 mins
09:10 CET: Deputy Operations Manager Silvia Sangiorgi (at ESOC) just confirmed the TGO remains healthy
07:30 CET: Fuelling of Proton launcher, which began on schedule at 04:31 CET, completed
04:50 CET: State Commission gives green light for launch. Weather prediction OK: cloudy, possibility some rain.
13 March: L-12 hours: TGO-switch on and telemetry link established; L-10:48: TGO battery charging completed.
12 March: ESA mission control completes dress rehearsal for launch. Full story
10 March: Filling of Breeze upper stage completed as planned
9 March: Integrated launch vehicle at the fuelling station in Baikonur for fuelling of Breeze upper stage
5 March: Spacecraft composite is mated with the Proton launch vehicle. Full report and images
2 March: Breeze upper stage and ExoMars composite are encapsulated within the two fairing halves of the Proton launcher. Full report and images
29 February: ExoMars spacecraft composite is mated with the launch vehicle adapter and installed on top of the Breeze upper stage. Full report and images.
21/22 February: ExoMars 2016 Trace Gas Orbiter is fuelled. Full report and images
Watch next series of live video updates via: http://www.esa.int/Our_Activities/Space_Science/ExoMars/Watch_ExoMars_launch
11:00 GMT / 12:00 CET Afternoon programme, including regular live updates on the status of the mission, a series of dedicated presentations on the scientific goals and operational challenges and milestones of the ExoMars missions, and informal question and answer sessions
21:10 GMT / 22:10 CET Evening programme, including confirmation of spacecraft separation, solar array deployment and first acquisition of signal
21:45 GMT /22:45 CET End of event