More than 100 schools have been closed after heavy snow affected parts of Scotland, with whiteout conditions in some areas making driving difficult. Dozens of schools in the north east, Scottish Borders and West Lothian have been shut, along with some in Angus, Moray and Perth and Kinross, according to the BBC. In the Borders, about 20 HGVs and several cars were stuck for several hours on a stretch of the A697. Lothian and Borders Police said the HGVs and cars on the A697 were stuck in snow two miles north of Greenlaw for about six hours from 06:00. The stretch between Greenlaw and Carfraemill had to be closed while vehicles waited to be freed by snow ploughs. The road is now passable with care. Drivers have been urged to take care and the Met Office issued warnings which cover Grampian, Central, Tayside and Fife, Strathclyde, South West Scotland and Lothian and Borders. Inverness Airport’s runway had been closed but flights are now arriving and taking off. Edinburgh Airport said snow teams were working to keep things running as normal, while snow was being cleared from the runway in Aberdeen. Passengers have been advised to allow extra time for travelling and to check with their airlines. On the roads in the central belt there snow has been heavy around Livingston and many routes in the north east, Borders, Mid and East Lothian are also only passable with care.