STAFF at Glasgow Central have been forced to hand out water to massive crowds waiting in sweltering heat after the city was plunged into travel chaos following a signalling fault.

As previously reported, a signalling fault between Glasgow Central and Paisley Gilmour Street resulted in dozens of trains being cancelled or significantly delayed.

The problem was resolved shortly after but has since re-occurred leaving hundreds of people stranded in the city centre station.

Services to Ayr, Ardrossan Harbour, Largs, Paisley Canal, Gourock, Wemyss Bay and Paisley Gilmour Street have been delayed, revised or cancelled.

Read more: Travel chaos as Glasgow Central train fault CANCELS dozens of services

A further signalling fault also occurred at Cumbernauld, affecting services to Dumbarton, Falkirk, Milngavie and Motherwell.

Angry passengers described the situation as an "absolute joke" and branded the station "a greenhouse" in the rising temperatures.

One Twitter user wrote: "I hope that you have some water for the elderly and kids stuck on the train from Johnstone when they eventually arrive in Glasgow Central. Dangerously hot."

While another added: "Every single train out of Glasgow central is delayed or cancelled.

"I finished work at 5! Still no sign of getting home any time soon."

ScotRail has apologised to customers and urged them to check its Journey Planner for updates.

First Bus is accepting tickets on certain routes.