In France (on lockdown already - we're not yet) these are the shops and services which are available. I don't know if the staff are considered key workers or whether all these shops have stayed open everywhere but this is what is permitted. No idea if we'll go the same way........
Food and drink
Retail sale of frozen food products
General food trade
Convenience stores
Supermarkets
Hypermarkets
Specialist fruit and vegetable shops (grocer)
Specialist meat and meat products shops (butcher)
Specialist fish, crustaceans and molluscs shops (fishmonger)
Specialist bread, pastry and confectionery shops (bakery)
Retail sale of beverages
Other specialist food shops
Retail sale of pet food and pet supplies
Gardening supply shops that also stock animal food (like Gamm Vert)
Food retailing on stalls and markets
Sale by vending machines and other retail sale not in stores, stalls or markets
Food banks and food charities
Food distribution by charitable associations
Petrol stations and garages
Maintenance and repair of motor vehicles, agricultural vehicles, machinery and equipment
Trade in automotive equipment
Sale and repair of motorcycles and cycles
Retail sale of fuel in specialised stores
Media, technology and computers
Retail sale of newspapers and stationery in specialised stores
Retail sale of information and communication equipment in specialised stores
Retail sale of computers, peripheral units and software in specialised stores
Retail sale of telecommunications equipment in specialised stores
Repair of computers and personal and household goods
Repair of computers and communication equipment
Repair of computers and peripheral equipment
Repair of communication equipment
Pharmacies and medical
Retail sale of pharmaceutical products in specialised stores
Retail sale of medical and orthopaedic articles in specialised stores
Laundry and dry cleaning
Laundry and dry-cleaning services
Wholesale laundry and dry cleaning
Retail laundry and dry cleaning
Hotels and accommodation
Hotels and similar accommodation
Tourist and other short-term accommodation where it constitutes a regular place of residence for the persons living there
Campgrounds and parks for caravans or recreational vehicles where they are a regular place of residence for the persons living there
Funeral services
Funeral services and funeral offices
Banks, finance, insurance and employment
Activities of labour placement agencies
Activities of temporary employment agencies
Financial and insurance activities
Farming, construction and equipment stores
Farm suppliers
Retail sale of building materials, hardware, paints and glass in specialised stores
Rental and leasing of other machinery, equipment and property
Rental and leasing of agricultural machinery and equipment
Rental and leasing of construction machinery and equipment