The Prime Minister will not be able to move on from the Lobbying row until he answers questions over Lynton Crosby's influence on government policy, according to a public relations expert.
Kevin Craig, from Political Lobbying and Media Relations, said Lyton Crosby's involvement in government policy "looks wrong and and doesn't feel right" and called on the Prime Minister to provide answers.
More top news
Former Girls Aloud singer Kimberley Walsh is pregnant with her second child, she has revealed.
Chancellor George Osborne will seek to reassure financial markets on Monday morning following Britain's decision to leave the EU.
In his first outing since the referendum result, the lead Leave campaigner has outlined his vision for a post-Brexit Britain.