- Games & Hobbies, London
- Garage Doors & Door Operating Devices, London
- Garage Doors & Gates, London - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, London
- Garden & Lawn Sprinkler Repair, Installation & Service, London
- Garment & Linen Services, London
- Gas Equipment Industrial, London
- Gas Station, London - Service & Filling Station
- General Business Services, London
- General Freight Trucking, London - Motor Freight
- General Management Consulting Services, London - Management Consultants
- General Merchandise Stores, London
- General Surgeons, London - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, London
- Generators, Compressors, Pumps, Motors & Fans, London
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- Gifts, Cards & Stationery Stores, London
- Glass & Glass Products, London
- Glass - Auto, Float, Plate, Window & Doors, London
- Golf Clubs Private, London
- Golf Courses, London
- Government, London
- Grace Brethren, London
- Grain Drying Equipment, London
- Grain Elevators, London
- Graphic Design Services, London - Graphic Designer
- Graphic Designer & Artist Services, London
- Grocery Stores & Supermarkets, London
- Ground Transportation, Except Passenger, London
- Gymnastics Schools, London
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