http://www.parliament.uk/documents/commons-vote-office/2014-October/13th%20October/17.DWP-welfare-reform.pdf

“national expansion will progress from February 2015 to all remaining Jobcentres and Local Authorities for new single claimants previously eligible for Jobseekers Allowance, including those with existing
Housing Benefit and Tax Credit claims”.

However, this thread on hbinfo shows the reality. The DWP are clearly not ready but are being pressed hard ….

http://new.hbinfo.org/forums/topics/help-universal-credit-recipient-no-housing-costs-included