Gary Smith, general secretary of the GMB union, accused the party of being "naive" and risking creating a "cliff-edge with oil and gas extraction from the North Sea" with its proposals.

Smith argued that the renewable energy sector has been promised tens of thousands of jobs "time and time again," but that they have not emerged.

He also pointed out that the existing oil and gas fields in the North Sea would run until 2050 and that the party is not talking about turning those off.

Reynolds, the shadow business secretary, defended the party's position, stating that the existing oil and gas fields would not do anything for bills, energy security, or jobs in the long-term and that it would be a "climate disaster." He also noted that the opportunity in clean energy is far greater in terms of jobs than the existing directly employed workforce in North Sea oil and gas.

The Scottish National Party (SNP) has also criticized the plan, calling it "short-sighted" and warning that it could lead to job losses in the industry.

A spokesperson for the party stated that a ban on new North Sea oil and gas licenses would be "a disaster for the Scottish economy." Labour's proposal to ban North Sea oil and gas production has been a contentious issue in the lead-up to the general election.

The party has argued that investing in renewable energy sources and nuclear power would be a better long-term solution for the country.

However, critics argue that the proposals could lead to job losses and economic instability in the short-term.