- Racing Car Supplies, London
- Racing Including Track Operations, London
- Radio Stations & Broadcasting Companies, London
- Radiologists, London - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, London - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, London
- Real Estate, London - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, London
- Real Estate Appraiser, London - Appraisal Services
- Real Estate Appraisers & Consulting Services, London
- Real Estate Management, London
- Real Estate Referral & Information Services, London
- Real Estate Rental Information, London
- Real Estate Services, London
- Recording Studio Service - Sound & Video, London
- Records, Tapes, Compact Discs Wholesale, London
- Recreational Equipment & Supplies Companies, London
- Recycling Drop-Off Centers, London
- Recycling Scrap & Waste Materials, London - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, London
- Refrigeration & Cooling Equipment, Parts & Supplies , London - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, London - Ac, Freezer, Refrigerator Repair
- Refrigerator Sales, Service & Repair, London - Fridge
- Rehabilitation Centers, Products & Services, London
- Rehabilitation Specialists, London
- Rehabilitational Job Training Services, London
- Relief Organizations, London
- Religious Education, London
- Religious Goods & Church Supplies Stores, London
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- Religious Organizations, London
- Religious Practitioners, London
- Repair Services, London
- Research Services, London
- Residential, London
- Residential Apartments, London
- Residential Architect, London
- Residential Care Facilities, London
- Residential Landfills, London
- Respiratory Medical Services, London
- Respiratory Therapy, London
- Restaurant & Food Service Management Services, London
- Restaurant Management & Consulting, London - Food Facilities Consultants
- Restaurants - Breakfast Brunch Lunch, London
- Restaurants/Food & Dining, London
- Retail Book Stores, London
- Riding & Rodeo Services, London
- Rigging Service & Crane Hoisting, London
- Road Construction, London - Companies & Contractors
- Road Construction & Repair Contractors, London
- Road Construction Equipment & Machinery, London
- Roofing & Siding Materials, Equipments & Supplies, London - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, London - Roofing Companies
- Roofing Contractors, London - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, London
- RV & Campers Repair & Service, London
- RV Repair, London - Recreational Vehicle
- Ryder Truck Rental , London - Ryder Moving
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