A VPN extends a corporate network through encrypted connections made over the Internet. Because the traffic is encrypted between the device and the network, traffic remains private as it travels. An employee can work outside the office and still securely connect to the corporate network.
Scotland, in common with the rest of the UK uses Pound Sterling (GBP) divided into 100 pennies (or pence). Scotland uses banknotes issued by three different commercial banks;- Royal Bank of Scotland, Bank of Scotland and the Clydesdale Bank. Bank of England banknotes are rarely accepted in Scotland.
I have used NI cash in Scotland, but only in shops that I know and am known. It is not common enough in circulation for shop keepers to recognise in many parts of the country. As with Scottish currency it is defined as legal money, not legal tender meaning that it can be used, but shops are not obliged to accept it.