Reporting a 3.5 per cent decline in net revenue for its digital business to £163.4m, Ladbrokes is continuing to make progress with its plan to reinvigorate the business.

"We are continuing to invest in technology to improve our trading capabilities, expand our range of products and improve our delivery to the customer. Mobile is delivering impressive growth with further product expansion and innovation to come throughout the year," commented CEO Richard Glynn.

Net revenue in mobile saw a significant increase of 174 per cent to £15.6m, while group net revenue for the business rose slightly by 0.4 per cent to £980.3m for the year ended December 31, 2011.

"We have begun investing consistently in brand and digital marketing and we will continue this investment process in 2012, having begun to see tangible benefits in 2011," added Glynn. Sportsbook and casino sign-ups and actives have increased strongly in H2 following the start of this increased marketing investment in August.