Snow in Scotland has forced supermarket giants Tesco and Sainsbury's to stop taking online orders from customers north of the border."We apologise for any inconvenience, but unfortunately we are currently unable to take any new orders in Scotland & the Scottish Isles," reads a statement on the Tesco Direct website."This is due to the adverse weather conditions causing a build up of orders. However, if you have already placed an order we will do our very best to deliver your items as soon as possible."Scots have had the worst of the recent snow, with some motorists stranded in their cars for days."Adverse weather in parts of the country is affecting some deliveries. We will deliver your parcel as soon as we can. If you have already placed an order we'll get it to you as soon as possible," the Sainsbury's website tells customers."We have temporarily suspended deliveries to Scotland and some parts of North-East England, if you are affected you will not be able to place an order."Parcel Force did the same at the weekend, while high volume online traders like Amazon and Firebox are struggling to guarantee next-day delivery."Whilst we will continue to deliver as many parcels each day as we possibly can, if we accept more parcels for the affected areas it will make recovery from the current position exceedingly difficult," Parcel Force said.