London -- A British union said shirts issued to female transport workers have been sent back due to thin fabric that "left little to the imagination."

Brian Brock, an official with the Transport Salaried Staffs Association, said new blouses issued to female workers on the National Express's East Coast line between London and Edinburgh, Scotland, were sent back to the National Express after they were found to be too thin and "left little to the imagination," The Daily Mail reported Wednesday.

"The blouses are simply too thin and too cheap. This is yet another example of National Express cutting costs at every corner," Brock said.

A National Express spokesman said the complaints are being investigated.

"We have undertaken wearer trials for the past six months and this issue did