Dr Martens has posted an 18% uplift in underlying revenue to £418.6 million in its half year results after trade was boosted by continuing investment in growing its global store footprint.

However, pre-tax profit slipped by 5% to £57.9 million in the six months to end September, although EBITDA was maintained at £88.8 million despite the company’s significant investment in new stores, IT, people and marketing.

Dr Martens sold 6.3 million pairs of boots, shoes, and sandals in the period which was 400,000 more on an underlying basis compared with the same time last year.

The company said the results would have been even stronger if £10 million of revenue from EMEA wholesale partners had not slipped from September to October due to strikes at the Port of Felixstowe and labour shortages at a Dutch distribution centre.

Sales in the US were particularly strong, with an uplift of 31%, following new store openings in Houston and Chicago. Meanwhile sales in Japan contributed 40% of APAC revenue to make the country the company’s third most important market after the US and UK.

During the period, Dr Martens opened 21 new stores and is planning to launch between 13 and 15 in its second half as it looks to meet its medium-term ambition of 25 to 35 more stores per year.