Mark Lazarowicz, a Labour MP for 14 years, described the first minister’s plan to secure a separate deal for Scotland as workable Getty Images

One of Scottish Labour’s most experienced politicians has broken ranks to call for Kezia Dugdale to support Nicola Sturgeon’s “Norway-style” Brexit deal for Scotland.

Mark Lazarowicz, a Labour MP for 14 years, described the first minister’s plan to secure a separate deal for Scotland as workable and sensible and he appealed to Scottish Labour to back the proposal.

Mr Lazarowicz, who lost his seat of Edinburgh North & Leith last year, said he believed that Ms Sturgeon’s Brexit plans would have a far greater chance of success if they were supported by Labour throughout the UK.

He said that voters would have far greater respect for the party if it adopted a mature and consensual approach, rather than “knee-jerk” opposition.

Mr Lazarowicz described the barriers…