UKIP MEP Nathan Gill has resigned as a member of the Welsh Assembly that he was elected to last year.
He announced: “It is with both sadness and relief that I am choosing to step down from my position as Assembly Member for North Wales.”
Mr Gill will be replaced by Mandy Jones who was the third candidate on UKIP election list for the region at last year’s elections.
“With the country now in the process of leaving the European Union, it is clear that the most pressing issue facing Wales is Brexit. With talks about to move on to the secondary stage, the institutions of the European Union will become increasingly involved in debating and advising on progress.
“I feel it is right that I concentrate on serving my term as an MEP and do my bit in helping to get the best deal for the country.
“As the only Eurosceptic MEP in Wales, I have a duty to give the majority of voters who backed ‘Leave’ in Wales the representation that they deserve and need in Brussels.”
He went on to say that he was sacrificing the job security of having a seat in Cardiff for another three years to pursue the issue that was most important, Brexit.
“This is not, as some people have baselessly stated, a decision that benefits me financially. Quite the opposite. I am leaving job security for the next three and a half years to commit myself to my political beliefs for one final but crucial year in the European Parliament.
“Serving in both Parliaments has given me invaluable insight but also revealed how deep the disconnect is between UK politicians sitting in different parliaments. If we share information and work more closely together, we can get the best deal for our country. I pledge to maintain an open door to all politicians in Wales, whichever body they are elected to, to consult me and collaborate with me in my role as an MEP as we move to the next critical stage of negotiations.”