British Telecommunications PLC (BT) is teaming with Yahoo Inc. to offer a joint Internet and broadband service to customers in the U.K. in an effort to drum up increased DSL (digital subscriber line) adoption.

The companies said Monday that they plan to roll out a bundled BT Yahoo Broadband service beginning in September, featuring a customized browser, personalized homepage and a variety of other new broadband applications that have yet to be announced.

The partners did say, however, that they are developing new services that will make use of Yahoo’s Messenger instant messaging (IM) application, and would provide features such as bolstered e-mail services and streaming news and entertainment.

The offering comes as BT looks to further the rollout of broadband in the U.K. Separately Monday it said it hopes to amass 5 million broadband customers by 2006, translating into