Probably delayed a month or so until late Oct / early Nov. Had the same thing last year when we had a relatively mild Oct; heating should have been turned on 1 Oct or thereabouts, but turning it on 1 Nov saved 20K.
My guess is a repeat of last year. Not a drama for me as I am a Northerner more comfortable in Norway than the desert; but I can see the point of view of some of the more 'southern' members of staff.
But yes, it is likely due to saving money rather than global warming.
Why JHC...... that is another question entirely!