Complex sentence: Heavy snow had fallen over much of the Country in late December early January, by the second week of January many of the roads and pavements had been cleared by local Councils due to the use of rock salt gritting.
Split into simpler sentences: Heavy snow had fallen over much of the country in late December and early January. By the second week of January, many of the roads and pavements had been cleared by local councils due to the use of rock salt gritting.