Banknote maker De La Rue has notched up a rise in annual profits as the first growth in its passport printing business for three years helped offset a fall in currency earnings.

The Basingstoke-based firm - which makes the new polymer £5 note - reported a 6% rise in pre-tax profits to £58.2 million for the year to March 25.

Annual revenue was 2% higher at £461.7 million.

The figures exclude the cash processing solutions business, which the company sold last May.

With the global banknote paper market facing oversupply, the firm has been stepping up efforts to expand into other areas, such as making passports and tax stamps.

Banknote print still comprises the largest chunk of the company's business, but underlying earnings in the division fell 9% to £50.3 million.

This was offset by the strong performance of De La Rue's identity solutions - or passport making - business, where revenue grew 5% to £80.6 million, the first rise since 2014.

This helped underlying earnings in the division surge 37% to £11.4 million.

Group results were also boosted by a 29% leap in underlying operating profits at De La Rue's product authentication and traceability business, to £9 million.

Martin Sutherland, chief executive of De La Rue, said: "We are two years into our five-year strategic plan and have made solid progress against our objectives to diversify the business and improve the quality of earnings."

The company, which has produced banknotes since 1860, also said it received a fillip from the fall in sterling since the Brexit vote, as it makes more than 80% of its revenues outside the UK.

De La Rue said it produced 7.1 billion banknotes last year, while the volume of polymer banknote paper it makes increased by 18% to 11,800 tonnes - a seven-year high.

Volumes of polymer notes nearly quadrupled to 380 tonnes, it added.

It follows the decision by the Bank of England to proceed with its new plastic £5 note, despite concerns raised by some vegans and vegetarians about the use of animal fat in the production process.

Mr Sutherland added the company has introduced six new products into its pipeline, including DLR Analytics, a software solution to help central banks manage their cash cycle requirements, which is being piloted in 26 countries.

The full-year dividend was maintained at 25p per share.