| Awaiting | Rosslyn Coffee | Restaurant/Cafe/Canteen | City of London Corporation | EC2M 1QT |
| 5 | Roxy Ball Room | Restaurant/Cafe/Canteen | City of London Corporation | EC3A 8AA |
| 4 | Royal Kitchen | Restaurant/Cafe/Canteen | City of London Corporation | EC3N 1AL |
| 5 | Rucoletta | Restaurant/Cafe/Canteen | City of London Corporation | EC2V 6HH |
| 5 | Rustichino | Restaurant/Cafe/Canteen | City of London Corporation | EC2V 6HH |
| 5 | S&W Partners Service Ltd | Restaurant/Cafe/Canteen | City of London Corporation | EC2V 7QA |
| 4 | SENZO | Restaurant/Cafe/Canteen | City of London Corporation | EC3N 2AQ |
| Awaiting | SOUP-R | Restaurant/Cafe/Canteen | City of London Corporation | EC4V 3DX |
| 3 | SYP | Restaurant/Cafe/Canteen | City of London Corporation | EC3A 7JB |
| 5 | Sackers | Restaurant/Cafe/Canteen | City of London Corporation | EC2V 7JE |
| 5 | Saint Espresso | Restaurant/Cafe/Canteen | City of London Corporation | EC4Y 0AY |
| 5 | Saint Espresso | Restaurant/Cafe/Canteen | City of London Corporation | EC3R 7AG |
| 5 | Salesforce Emea Ltd | Restaurant/Cafe/Canteen | City of London Corporation | EC2N 4AY |
| 5 | Sam's Cafe, Markel International | Restaurant/Cafe/Canteen | City of London Corporation | EC3M 3BY |
| 5 | Sandwich Sandwich | Restaurant/Cafe/Canteen | City of London Corporation | EC3R 7NQ |
| 4 | Satyrio Restaurant | Restaurant/Cafe/Canteen | City of London Corporation | EC3N 1AL |
| 5 | Savills - Lexington Catering Ltd | Restaurant/Cafe/Canteen | City of London Corporation | EC2M 7EB |
| 4 | Scaldy | Restaurant/Cafe/Canteen | City of London Corporation | EC3N 3AE |
| 5 | Scarpetta | Restaurant/Cafe/Canteen | City of London Corporation | EC2N 3AR |
| 5 | Searcys | Restaurant/Cafe/Canteen | City of London Corporation | EC2R 6EA |
| 5 | Searcys | Restaurant/Cafe/Canteen | City of London Corporation | EC1A 4HT |
| 5 | Searcys | Restaurant/Cafe/Canteen | City of London Corporation | EC3A 8BF |
| 5 | Searcys, Main Hall | Restaurant/Cafe/Canteen | City of London Corporation | EC4Y 7HL |
| 5 | Seasoned | Restaurant/Cafe/Canteen | City of London Corporation | EC4V 3DB |
| 5 | Seedy Circles | Restaurant/Cafe/Canteen | City of London Corporation | EC4A 2DQ |
| 5 | Serco Pecs | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 7EH |
| 5 | Serenity Zephyr Ltd (Teapsy Project) | Restaurant/Cafe/Canteen | City of London Corporation | WC2A 1LB |
| 4 | Sfrigola | Restaurant/Cafe/Canteen | City of London Corporation | EC3V 1LR |
| 5 | Shake Shack | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 5SB |
| 5 | Shiro, Unit G04-U04, Ground And First Floor | Restaurant/Cafe/Canteen | City of London Corporation | EC2M 2AT |
| 3 | Shoo Loong Kan | Restaurant/Cafe/Canteen | City of London Corporation | EC1N 2LL |
| 2 | Shugetsu Ramen | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 7AU |
| 5 | Sky Beirut | Restaurant/Cafe/Canteen | City of London Corporation | EC3M 1JA |
| 5 | Skygarden - Darwin Brasserie 36 FLR | Restaurant/Cafe/Canteen | City of London Corporation | EC3M 3BY |
| 5 | Skygarden - Fenchurch Restaurant | Restaurant/Cafe/Canteen | City of London Corporation | EC3M 3BY |
| 5 | Skygarden - Sky Pod CafÉ/Bar | Restaurant/Cafe/Canteen | City of London Corporation | EC3M 3BY |
| 5 | Slim Chickens | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 8AL |
| 5 | Slim Chickens | Restaurant/Cafe/Canteen | City of London Corporation | EC2M 4QD |
| 5 | Smit Cafe & Curry House | Restaurant/Cafe/Canteen | City of London Corporation | EC1A 9EJ |
| 2 | Smithfield Cafe | Restaurant/Cafe/Canteen | City of London Corporation | EC1A 9EJ |
| 5 | So Restaurant | Restaurant/Cafe/Canteen | City of London Corporation | E1 7AA |
| 5 | Social Pantry | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 7EH |
| 5 | Sodexo | Restaurant/Cafe/Canteen | City of London Corporation | EC4Y 0DY |
| 5 | Sodexo, Quilter Plc | Restaurant/Cafe/Canteen | City of London Corporation | EC4V 4AB |
| 5 | Sodexo, Threadneedle Asset Managment | Restaurant/Cafe/Canteen | City of London Corporation | EC4N 6HL |
| 5 | Soho Coffee | Restaurant/Cafe/Canteen | City of London Corporation | EC2V 7AY |
| 2 | Soho Coffee | Restaurant/Cafe/Canteen | City of London Corporation | EC4M 8AL |
| 5 | Soho Coffee Shop | Restaurant/Cafe/Canteen | City of London Corporation | EC2N 2HE |
| 4 | Soho Gourmet, Catering Unit Within Spirit Of Man | Restaurant/Cafe/Canteen | City of London Corporation | EC3A 2BJ |
| 5 | Soul & Grain | Restaurant/Cafe/Canteen | City of London Corporation | E16 2PX |