Construction of the biggest wastewater tunnel in Scotland has reached the halfway stage.
The £100 million Shieldhall Tunnel, being built by Scottish Water and 3.1 miles long, is expected to improve water quality in the River Clyde and tackle flooding.
Last week, engineers installed a set of the giant concrete rings that form the tunnel around 10 metres under the east of Pollok Park at a point that is 1.55 miles along the route.
The first half of the tunnel would be able to store the equivalent in wastewater of 18 Olympic-sized swimming pools.
According to Scottish Water, more than 90% of the excavated material will be recycled.
The project is part of the company’s £250 million, five-year programme to improve air quality and the natural environment.