Bootmaker Crockett & Jones, whose shoes were worn by Daniel Craig in James Bond film Spectre, has cheered higher sales but warned of potential production difficulties. The Royal Warrant holder said it sees “significant” growth potential in the medium term. But it added: “expanding production may be more difficult because of the limited availability of skilled labour”, and the higher cost of leather. The Northamptonshire-based firm, which employs 413 people, made the comments in accounts just filed for the year to February 8. During the period, the manufacturer, which has six London shops including on Jermyn Street, saw pretax profits decrease to £4.9 million from £5.3 million. It was hit by higher costs for distribution, rents and business rates. Crockett & Jones, founded in 1879, said it would continue to invest in the business and open a second New York store next year. Turnover rose to £31 million from £29.4 million.