Okay, hour-by-hour forecast for Evesham according to the NMM:
Sat 16.00: light sleet (0.44mm)
Sat 17.00: moderate sleet (1.01mm)
Sat 18.00: moderate sleet (1.48mm)
Sat 19.00: heavy icy rain (2.53mm)
Sat 20.00: moderate icy rain (1.6mm)
Sat 21.00: moderate icy rain (1.8mm)
Sat 22.00: moderate icy rain (1.78mm)
Sat 23.00: moderate icy rain (0.86mm)
-------------------------------------------------
TOTAL PRECIPITATION: 11.5mm
As you can see, looking very marginal where you are. Temps look a little too high to me, especially later on on Saturday. 2.4C by 11pm according to this model which is far too high. The best thing that could happen for you is it moving through a bit quicker. Otherwise I could see it being snow turning to rain.