The fashion group added that no financial details were available for comparison for the period between December 11 and January 15, due to a fuel depot explosion last year, which forced its warehouse to close. However, ASOS is confident that the strong trading has continued.

Nick Robertson, chief executive, said: We had a great Christmas. The fact that we continue to outperform the online market in general is testament to our buyers, our proposition, and the enduring appeal of ASOS amongst our core customer base. Due to the warehouse closure last year, we do not have a comparative for the whole Christmas period. Current trading is in line with internal forecasts and at this stage we estimate our profit before tax for the full year will be in line with market expectations.