THE Prime Minister must order Government departments to publish full details of parental leave entitlement, LibDem deputy leader Jo Swinson has urged.

Swinson, who is currently on maternity leave, has revealed only four of 25 government departments currently publish information about the rights of new parents.

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She said: "Discrimination against pregnant women and new mothers is still rife in the workplace.

"I am deeply disappointed that until recently just two Government departments published their parental leave and pay entitlements.

"The Civil Service should set the gold standard for employers across the UK, but on this issue it is failing. "

Only the Department for Work and Pensions (DWP), Ministry of Defence (MoD), Department for Education (DfE) and the Department for Transport (DfT) publish detailed information about their parental leave and pay entitlements online.

As employment relations minister, Swinson oversaw the introduction of shared parental leave.

Now she is pursuing a Private Member's Bill which, if successful, would require employers with more than 250 employees to publish information about parental leave and pay entitlements.

"If Theresa May wants to tackle society's burning injustices, as she claimed on the steps of 10 Downing Street, then I fully expect her to support my Bill," she said.

"The Prime Minister must instruct all departments to put this information in the public domain at once."

A spokesman for the Prime Minister declined to comment.

A Cabinet Office spokesman said there were plans to publish further details on parents' entitlements on gov.uk in the coming months.

She added: "The Civil Service offers a full range of parental leave, including shared parental and adoption leave, for which it pays occupational rates.

"Details of these policies are well publicised to employees online."