The agency won the business following a pitch against Miles Calcraft Briginshaw Duffy and the incumbent Abbott Mead Vickers BBDO, which has handled the account since August 2005.
DLKW will handle the advertising for Digital UK for a minimum of 34 months, with an option to extending the period for a further two years.
The agency will create campaigns on a local and regional basis, using TV, radio, press, outdoor and ambient executions.
During its time working on the account, AMV BBDO was responsible for introducing the character 'Digit Al' into its campaigns, a robot who travelled around the country informing people about how they can make the switch to digital TV.
Last year, Digital UK also held statutory reviews of its direct marketing and digital accounts.
The organisation's direct marketing account moved from Rapier to Elvis, while its digital business remained with the incumbent Grand Union.