Numerical weather models give forecasters guidance on all aspects of the weather, including potential snowfall amounts. With the prospect of snow over the next few days here is an example of model output for potential snow amounts on Monday, in the 24 hours from 00GMT Monday, in centimetres.
Some fairly high snowfall totals are possible in places, with eastern areas most at risk. It should be noted that Scotland and northern parts of England are likely to have a few cms on Sunday and overnight.
Bear in mind that this is just model output, not a promise. Even so, it would be interesting to see your photos and for you to let us know how much snow you have. Ideally this should be measured on a flat surface using a ruler - a photo of the ruler in the snow is even better!