For the duration of the end-of-year shutdown (17:01 on December 15th, 2014 through to 07:59 on January 5th, 2015), a scale factor of 0.04 will be applied to all Internet quotas, irrespective of time of day. (In other words, the demand side management system will treat the whole shutdown as is does the early hours of the morning.)
These changes apply retrospectively from the times mentioned above.