Let it snow. The predicted 10-20cm of snow arrived with more forecast and temperatures around freezing. It's in the DNA of plants that are native or naturalized in the UK to survive cold winters and in fact thrive on them as part of their life cycle.
 For example, there is an old cherry tree in next door's garden. Like other stone fruit trees a period of winter chilling is required for it to flower and fruit well. The last time we had a brutal winter 5 or 6 years ago it flowered magnificently in the spring in a shimmering mass of pink blossom. Be interesting to see if the same happens this year.