Britain's new government announced plans on Wednesday to strengthen the role of the country's official budget watchdog, the Office of Budget Responsibility (OBR). This move is part of Prime Minister Keir Starmer's strategy to boost Britain's attractiveness to investors.

The new legislation, revealed by King Charles in parliament, mandates that all fiscal events involving significant and permanent tax and public spending changes be assessed by the OBR. This decision comes after the previous administration under Liz Truss and finance minister Kwasi Kwarteng triggered a crash in British government bond prices in 2022 by announcing major tax cuts in a 'mini-budget' without OBR assessment.

The OBR's forecasts on growth and government borrowing typically accompany budgets and other major fiscal statements. While some analysts believe the new law may not have a significant practical impact, it underscores the Labour Party's commitment to involving the OBR in assessing its fiscal plans.

Paul Diggle, chief economist at investment firm abrdn, noted that the success of Labour will depend on whether they can stimulate UK growth through reforms to the planning system, green industrial policies, and potentially closer ties with the EU.

Prime Minister Starmer and finance minister Rachel Reeves aim to position Britain as the fastest-growing economy in the Group of Seven by implementing planning reforms and increasing investment. They have pledged to adhere to fiscal rules similar to those of the previous Conservative government but with slightly more borrowing flexibility to fund investment.

In addition to the OBR legislation, the government confirmed plans to establish a National Wealth Fund to drive investment into key industrial sectors, including renewable energy. The fund will build on the existing UK Infrastructure Bank and will receive 7.3 billion pounds ($9.5 billion) of capital to attract 20 billion pounds of private investment.