I am in lockdown in Spain have been since Saturday evening I live here.
The rules are pretty strict and may differ from the UK.
We are not allowed out just to go for a walk only to walk the dog and only 50m from the house. Only one person is allowed to walk the dog.
We can go to the supermarket which is fully stocked no issues with getting food. But again only one person is allowed in the car. Gloves are provided at the entrance to supermarket and staff are wearing masks. Customers are not wearing masks as yet as they are in short supply.
We can go to the chemist same rules as above.
We can get petrol.
People who are in frontline jobs for example emergency services, hospital staff, staff in supermarkets and delivery drivers are allowed to work. They must travel to work alone.
All other places are closed. There are police stationed at the entrances to our housing estate and stopping every vehicle to ask where you are going.
You are only allowed to visit relatives if they are in need of care or help and again on your own.
I am self employed and ordered to shut up shop Saturday by the guardia, I now have no income for the for foreseeable future. We have been told 15 days so far but rumours are that it will go on longer. Luckily as it stands my husband is able to work from home as long as the business survives so we can afford to pay our rent etc.