UKIP Deputy Leader Margot Parker and immigration spokesman Job Bickley have resigned their positions in the party and called for Kenyan born leader Henry Bolton to step down.
Speaking to BBC Radio Northampton, East Midlands MEP Ms Parker said that Mr Bolton had left the party in “limbo” and that he should go “sooner rather than later” after his “personal life took over the job he was elected to do”.
She added: “It would be quicker and cleaner if he came to the conclusion he could go sooner rather than later.
“This is taking time away from doing the job. This puts the party in a limbo situation.”
Mr Bolton, who was only elected leader last September, has been under fire over texts sent by his former girlfriend Jo Marney. He has said he would defy the NEC and continue as leader, adding that a contest would finish the party.
UKIP members will now be given a vote on whether the former Army officer should remain in post.