A remarkable display is expected in the skies over the UK later this week as a vast plume of Saharan dust drifts north over much the country. The dust, made up of fine sand and mineral particles lifted from the deserts of North Africa, will have travelled thousands of miles on warm southerly air currents. As it moves across the UK, it is expected to transform ordinary sunrises and sunsets into striking displays of deep gold, amber, and burnt orange. However, the downside of Saharan dust is that when it mixes with rain, it can leave dirty deposits on surfaces, particularly cars and windows, a phenomenon commonly known as blood rain. Satellite image on Tuesday showed a brown haze over Spain which is lifted Saharan dust The brightest colours are expected on Thursday and continuing into Friday, especially when skies are clear at sunrise and sunset. The most noticeable displays are likely to occur in England and Wales as clearer and cooler conditions arrive from the west by the end of the week.…