To enable a roll-out of an upgrade to the platform’s registration system, Digimap services will be interrupted on 26-27 January 2015. Digimap explains:
New users will not be able to register for Digimap from 4pm on 26th Jan and all Digimap services will be unavailable all day on 27th Jan. Normal service will resume by 9am on 28th Jan.
More information about the outage and upgrade can be found on the Digimap blog.