Wagamama achieved an 8.5% increase in like-for-like (lfl) sales at its UK restaurants, during the 16 weeks to 19 August 2018.

Group turnover increased by 12.3%, including franchise income, to £97.4m in Q1 2018/19, with four new sites added in the UK – Liverpool New Mersey, Rushden Lakes, Chelmsford and East Midlands – over the period.

Adjusted EBITDA was up 1.9% to £12.7m, in the first quarter, despite headwinds, with the company posting a loss after tax of £2.2m.

The group said it had outperformed the market in the UK by 10.1%, and consistently traded ahead of the competition for more than four years.

Among Wagamama’s other operational highlights were the completion of four refurbishment projects, bringing Kaizen design and additional covers to its existing estate where possible.

There are currently refurbishments underway at a further four sites (Wigmore Street, Liverpool, Putney and Victoria).

The period also saw new franchise restaurants open in Qatar, the UAE, Norway and Italy. Turnover in its US-operated sites rose 10.3% to £3.2m, and was up by 25% to £1m in its franchise business.

Jane Holbrook, CEO, said: “‘I am very lucky to work with the best people in the industry. They have continued to deliver outstanding UK like for likes and I’m delighted to say we’ve also achieved our highest customer net promoter score and lowest team turnover on top of good profit growth. I thank them all for the enormous passion and commitment to this wonderful brand.”

Wagamama currently has 133 company-operated restaurants in the UK, four in the US and 58 international franchise sites.