You need a touch of colour on days like today. Days when daylight comes grudgingly and brings a sleet storm or two with it. Days when you approach a pile of grainy black and grey photos from forty odd years ago and wonder why our memories never made it into technicolour. So, on days like today, you press this button and that button, slide this slider and adjust that one. This is the age of the Photoshop filter. It is a hit and miss game: pictorial roulette where the odds are stacked in favour of the monochrome banker. But occasionally, just occasionally, you win one and something emerges that makes you smile. Something with a touch of colour.