Why was the Clyde Tunnel closed last night?
The Clyde Tunnel was shut to traffic last night while emergency services carried out a major training exercise.
The exercise on the M8 involved the Clyde Tunnel - which links Govan to Whiteinch in Glasgow.
The incident involved police, firefighters and ambulance crews.
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Hide AdDrivers were urged to seek alternative routes, but the tunnel was open as usual this morning after the exercise was completed by 10pm yesterday.
A spokesman from Police Scotland said: “This live play exercise is an integral and important part of our training.
“It has not impacted the local communities or any of the services involved.”