| Catagories | Records | | Catagories | Records |
| Labelling Equipment | 64 | | Lift Mnfrs | 97 |
| Labels & Tags | 538 | | Lifting Equipment | 488 |
| Laboratories | 243 | | Lifts - Servicing & Repairs | 314 |
| Laboratory Equipment | 194 | | Lighting Consultants | 286 |
| Laboratory Instruments | 26 | | Lighting Contractors | 90 |
| Laboratory Supplies | 96 | | Lighting Mnfrs | 514 |
| Lace Mnfrs | 33 | | Lighting Retailers | 587 |
| Ladder Mnfrs | 18 | | Lighting Wholesalers | 244 |
| Ladder Sales | 26 | | Lightning Conductors | 44 |
| Ladieswear - Retail | 4232 | | Lime Mnfrs & Distributors | 28 |
| Ladieswear - Wholesalers | 138 | | Limousine Hire | 16 |
| Lamination & Encapsulation Services | 118 | | Linen Hire Services | 104 |
| Lampshade Mnfrs & Distributors | 40 | | Linen Mnfrs & Wholesalers | 48 |
| Landscape Architects & Designers | 644 | | Linen Shops | 195 |
| Landscape Contractors | 4038 | | Lingerie & Hosiery - Retail | 945 |
| Language Schools | 774 | | Lingerie Mnfrs & Wholesalers | 157 |
| Laser Cutting Services | 85 | | List Brokers | 22 |
| Laser Equipment - Sales Service & Repair | 94 | | Literary Agents | 76 |
| Laundries & Launderettes | 1854 | | Lithographic Plate Makers | 74 |
| Laundry & Dry Cleaning Supplies | 46 | | Livery Companies | 30 |
| Laundry Equipment - Sales & Service | 67 | | Livestock Breeders & Dealers | 298 |
| Laundry Equipment Mnfrs & Suppliers | 25 | | Livestock Markets | 97 |
| Lawnmowers & Garden Machinery - Sales & Service | 1283 | | Livestock Transportation | 83 |
| Leaded Lights & Windows | 99 | | Loans | 193 |
| Leasing Services | 213 | | Loans & Debt - Management | 23 |
| Leather Garments - Mnfrs & Suppliers | 121 | | Local Government | 2511 |
| Leather Goods - Cleaning | 10 | | Lock Mnfrs | 8 |
| Leather Merchants & Wholesalers | 97 | | Lock Smiths | 1072 |
| Leather Products - Mnfrs & Suppliers | 339 | | Lock Suppliers | 44 |
| Leathergoods Shops | 689 | | Loft Conversions | 442 |
| Legal Services | 1295 | | Loft Ladders | 22 |
| Leisure & Recreation Centres | 2804 | | Logs, Firewood & Peat Fuel | 90 |
| Leisure Wear | 365 | | Loose Covers | 83 |
| Letting Agents | 2939 | | Lubricant Mnfrs & Distributors | 188 |
| Libraries | 3716 | | Lubricating Equipment | 23 |
| Life Assurance | 86 | | Lubrication Services | 43 |
| Luggage - Retail & Wholesale | 273 | | | |
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