Associated Northcliffe Digital, which operates sites including DailyMail.co.uk and ThisIsLondon.co.uk, will have sales staff selling ad inventory into the network from London, paidContent reported.

As newspapers begin to realise they can profit from their editorial clout, more are creating their own ad networks.

Last week, The Guardian announced it would partner with Adify, which also partners Time Warner, The Washington Post Company, Reed Business Information, NBC Universal, MediaNews Group, RP Online and Comcast Corporation, among others, according to the company's Web site.