Back in the UK

Left a city lashed with rain, (heaviest rainfall Dubai has seen in several years, floods, animals lining up on Jumeirah beach Two by Two) and landed in one gripped by frost (at least it's seasonal).

Stayed awake long enough to get through the front door - then crashed on the sofa for 5 hours, stunned senseless by lack of sleep.

Got a text at 9pm, just as I made it up the stairs to bed; one of my producer's other projects, an Iraqi film about a child's unexpectedly dangerous quest for perfect kite making materials, was fully funded - several times over.

I'm functioning - but slowly, and I know I'm going to hit "the wall" before the evening is over.