Under-fire Preseli Pembrokeshire MP Stephen Crabb has been referred for investigation by the Conservative Party under a new code of conduct, following fresh sex text allegations.

The former Welsh Secretary and Secretary of State for Work and Pensions has once again been at the centre of tabloid headlines of sending inappropriate text messages to a 19-year-old woman.

The woman had been interviewed for a job at Mr Crabb's office in London but was rejected.

In comments made to the national media, Mr Crabb accepted that the nature of the text messages "basically amount to unfaithfulness" but he denied any suggestions that the job interview had not been carried out professionally and transparently.

The married-father-of-two had previously stood down from his role at the DWP "in the best interests" of his family following separate accusations of sending inappropriate messages to a woman.

Mr Crabb’s majority fell from 4,969 in 2015 to 314 in the June snap election.

Mr Crabb told the Western Telegraph: “I understand the need for all political parties to show they have robust processes in place to consider allegations of harassment. 

"It is important to understand that no such allegations or complaint has actually been made against myself, but I am happy to co-operate as I believe my name will be cleared of any wrongdoing.  

"I will continue to serve the people of Preseli Pembrokeshire with the same determination as I have done for the past 12 years.”

Speaking to Sky News yesterday, Home Secretary Amber Rudd said Parliament was now at a watershed moment.

Ms Rudd predicted that the wave of sleaze allegations sweeping Westminster would lead to a positive "clear-out" which would leave Parliament and the Government in better shape.

The Home Secretary said she wanted the sanction of sacking MPs to be considered as part of a major overhaul of anti-harassment procedures at Westminster.

She told Sky News: "I think that that is one of the things that I would encourage the review to look at. It may be the case, it may not.

"It is wrong for us to have a knee-jerk reaction based on the past week. I think what we need to do is look at the whole issue. There needs to be a procedure put in place as soon as possible."