Dreaming of a white Christmas (#1,132)

A. A single snowflake has to be recorded falling at any time during the 24 hours of 25 December on the roof of the Met Office in London

B. A single snowflake has to be recorded falling at any time during the 24 hours of 25 December on the roof of the Met Office's headquarters in Exeter

C. A single snowflake has to be recorded falling at any time during the 24 hours of 25 December at any of the Met Office's network of around 300 observing stations

A. None

B. 1

C. 4

A. England

B. Scotland

C. Wales