The account is currently held by Rapier, which was awarded the work in 2006, but legally must be re-tended according to OJEU guidelines.
The new contract is due to start next March and will finish in October 2012 -- the time when the final analogue switch-off is thought to take place.
The tender document says that the services required by Digital UK include direct-to-consumer campaign development, collaborative development of strategic and direct marketing plans and support to leverage database knowledge of prospects and customers.
Much of the marketing activity to date has focused on raising awareness of the switch-off and on digital television alternatives, such as Freeview.
As the region-by-region process gets underway, more detailed information will be needed to help consumers to cope.
Digital UK already uses Abbott Mead Vickers BBDO to raise awareness of its Switchover Help Scheme, designed to make sure that older people and the less well off do not get left behind.
Digital agency Grand Union also works on the brief and the media account is with Mediacom.
The full tender document can be found .