I very much doubt that any absolute cold records will be broken, but there are some spectacularly low temperatures around in central England this evening, and several "coldest since" type records are possible tonight. The evening drop off at Benson, and Woodford, for example, is remarkable by any standards, but in recent times almost certainly unprecedented, and indicative of locations sitting in sinks below uplands, with snow lying, fairly still air, and clear skies; perfect conditions for cold pooling. The records set, for example in December 1981, occurred in not dissimilar conditions BUT built up over several days. The record minimum set at Shawbury, for example, and the minima in same period in the Scottish glens (e.g. Braemar) were marked by days where maxima stayed well below, if memory serves me right, -10C, with freezing fog abounding. The current set up is likely to be too mobile, and also there is some ephemeral cloud around, both of which will spoil exceptionally low temperatures. Therefore, I'd suggest, some notable lows tonight, but not setting absolute records for the UK, nor coming close to it.