Driving around and visiting people at Christmas time is good; none of the drives are too long, it's good to get a few days away from home every now and then if only because it forcibly prevents me jumping up every two minutes with a sudden idea about some coding, the family Christmas meals are always excellent, and so on. But nonetheless, when I've pulled up in my own driveway, unloaded the car, unpacked my stuff and sat down in my own home, there's also a feeling of ‘phew, back home at last’.

So, yes; I'm back from the Thames Valley, ensconced in Cambridge once more, and intend to do very little for at least the rest of today.