Topshop is to launch an app and mobile optimised website in the coming months, with 8% of all online sales currently coming from mobiles.

The clothing retailer is seeing a higher proportion of sales coming via mobile phones than the average for retailers despite the fact it has not yet developed a mobile website.

Over the last few months, Topshop has launched a marketing initiative with mobile gaming service SVNGR aimed at students which rewarded challenge completions with free gifts, discounts and competitions.