Islington Business by letter: h
- H F H Vision Ltd, Islington
- H G Bar & Restaurant, Islington
- H G Lockey & Sons, Islington
- H Gaventa Ltd, Islington
- H Hussain, Islington
- H I Green, Islington
- H J Kateb, Islington
- H L Wilkinson & Co Ltd, Islington
- H M Prison, Islington
- H M Prison (Holloway), Islington
- H M Prison (Pentonville), Islington
- H Rainsbury & Co, Islington
- H Rich Textiles Ltd, Islington
- H S B Partnership, Islington
- H Samuel, Islington
- H T M Store, Islington
- H Tailor, Islington
- H V Kingsley, Islington
- HAC Armoury House, Islington
- HACAS Chapman Hendy, Islington
- Hackney & Islington Refugee Training Partnership, Islington
- Hadaly Pictures Ltd, Islington
- Haggle, Islington
- Haggle Vinyl Ltd, Islington
- Hair At Canonbury Place, Islington
- Hair Base Unisex Hair & Beauty Salon, Islington
- Hair Nail & Beauty, Islington
- Hair Shack, Islington
- Hairdressing & Beauty Equipment Centre Ltd, Islington
- Halesmere Letting & Property Management, Islington
- Half Moon Crescent Tenants Co-operative, Islington
- Halifax PLC, Islington
- Halifax PLC, Islington
- Halifax PLC, Islington
- Halifax PLC, Islington
- Halim Mouhib, Islington
- Hall Walker Steven Ltd, Islington
- Hallal Butcher, Islington
- Hallmark Blinds Ltd, Islington
- Hallmark Design, Islington
- Halo Centre Of Balance, Islington
- Halo Imports, Islington
- Halstead, Islington
- Hamiltons, Islington
- Hamiltons, Islington
- Hamiltons Event Managemnt Ltd, Islington
- Hamlet Trust, Islington
- Hampers, Islington
- Hampers By Design, Islington
- Hamptons International, Islington
- Hana, Islington
- Hanaco Magic Vision Ltd, Islington
- Hand Car Wash, Islington
- Hand Car Wash, Islington
- Hanley Crouch Community Association, Islington
- Hanley Crouch Community Association Ltd, Islington
- Hanley Ltd, Islington
- Hanley Primary Care Centre, Islington
- Hanover Primary School, Islington
- Hanway Print Centre, Islington
- Happy Days, Islington
- Harcourt, Islington
- Hard As Nails, Islington
- Hargrave Hall Community Centre, Islington
- Hargrave Park Primary School, Islington
- Harlequin, Islington
- Harlequin Display Ltd, Islington
- Harmony Hair Studios, Islington
- Harold & Leslie, Islington
- Harper & Odell, Islington
- Harpers, Islington
- Harput Best Kebad, Islington
- Harriman Chemsult Ltd, Islington
- Harris Da Silva, Islington
- Harrison Catering Services, Islington
- Harry Motors, Islington
- Harry Trading, Islington
- Harry Weston Tenants Co-Operative, Islington
- Harrys, Islington
- Hart Advertising, Islington
- Harters, Islington
- Hartmann Architects, Islington
- Harwin Shipping Agency Ltd, Islington
- Haseeb Mini Supermarket Ltd, Islington
- Hawkins Brown, Islington
- Hawkins Brown Ltd, Islington
- Haworth, Islington
- Haworth Tompkins Ltd, Islington
- Hayter Associates, Islington
- Hayward Adventure Playground, Islington
- Hazel Wilson, Islington
- Head2Toe, Islington
- Headbangers, Islington
- Headlites, Islington
- Healey Graham & Co, Islington
- Health & Life Sciences Partnership, Islington
- Health Club Partners, Islington
- Healthcare Commision, Islington
- Healthwise, Islington
- Healthy Living Shop, Islington
- Heat Efficiency Ltd, Islington
- Heating Replacement Parts & Controls Ltd, Islington
- Heaven, Islington
- Heddonglow, Islington
- Hello Britain, Islington
- Hemingford Arms, Islington
- Henley Media Group, Islington
- Henriatta Van-Zaelen, Islington
- Henry Y Smith & Co, Islington
- Hensons Refrigeration Services, Islington
- Her House, Islington
- Herbert Smith, Islington
- Hercules, Islington
- Hercules Car Service, Islington
- Hercules Tavern, Islington
- Heritage Care, Islington
- Heritage Star, Islington
- Heron Dawson & Sawyer, Islington
- Hewden Hire Center, Islington
- hhm, Islington
- Hickman & Rose, Islington
- High Class Shoes, Islington
- High Track Communications, Islington
- High Vision, Islington
- High Vision, Islington
- Highbury, Islington
- Highbury Catering, Islington
- Highbury Cleaning Services, Islington
- Highbury Counselling Centre, Islington
- Highbury Fine Food & Wine, Islington
- Highbury Fish & Chips, Islington
- Highbury Ford, Islington
- Highbury Fruiterers, Islington
- Highbury Grove Crisis Project, Islington
- Highbury Grove School, Islington
- Highbury Health Foods, Islington
- Highbury Jeans Centre, Islington
- Highbury Laundry, Islington
- Highbury Park Clinic, Islington
- Highbury Pets, Islington
- Highbury Pharmacy, Islington
- Highbury Pool, Islington
- Highbury Quadrant Primary School, Islington
- Highbury Round House Youth & Community Centre, Islington
- Highbury Self Storage, Islington
- Highbury Vintners, Islington
- Highgate Cars, Islington
- Highgate Nursing Home, Islington
- Highland Plumbing & Heating Service Ltd, Islington
- Highpoint Advertising, Islington
- Highspeed Office, Islington
- Hikari Tsushin Europe Ltd, Islington
- Hildebrand Design, Islington
- Hill Green Recruitment, Islington
- Hillel Weintraub Optometrists Ltd, Islington
- Hillmarton Tandoori, Islington
- Hillrise Sheltered Housing, Islington
- Hills Tiling, Islington
- Hillside House Club House, Islington
- Hinton J & W, Islington
- Hip Eau, Islington
- Hirst Trimmings Ltd, Islington
- His & Hers, Islington
- His & Hers Hair Design, Islington
- His Glory, Islington
- His Hers, Islington
- Historical Publications Ltd, Islington
- HLW International Ltd, Islington
- HMV UK Ltd, Islington
- Hodges Associates Ltd, Islington
- Hoggar Business Ltd, Islington
- Hogshead, Islington
- Hogshead, Islington
- Holborn Business Supplies Co Ltd, Islington
- Holborn Dental Centre, Islington
- Holbrook Co-Operative Ltd, Islington
- Holden & Partners, Islington
- Holden Matthews, Islington
- Holdroman Engineering Co Ltd, Islington
- Holistic Hair, Islington
- Holland & Barrett, Islington
- Holland & Barrett, Islington
- Holloway Best Kebab, Islington
- Holloway Cafe & Coffee Shop, Islington
- Holloway Co-operative Playgroup, Islington
- Holloway Cycles, Islington
- Holloway Dental Centre, Islington
- Holloway Dry Cleaners, Islington
- Holloway Express Cleaners, Islington
- Holloway Food Store, Islington
- Holloway Furniture, Islington
- Holloway News & Post Office, Islington
- Holloway Off License, Islington
- Holloway Parents Centre, Islington
- Holloway Secondary School, Islington
- Holloway Shoe Repairs & Key Cutting, Islington
- Holloway Sports, Islington
- Holloway Tyres, Islington
- Hollywood's Cafe, Islington
- Holmes Place, Islington
- Holmes Place PLC, Islington
- Holocene Associates Ltd, Islington
- Holy Chinese, Islington
- Holy Ghost International, Islington
- Holy Redeemer & St Markes C Of E Church, Islington
- Holywell Trading, Islington
- Home, Islington
- Home Interiors (London) Ltd, Islington
- Home-Start, Islington
- Homoeopathy Allergy Store, Islington
- Honour, Islington
- Honourable Artillery Co, Islington
- Hoop Associates Ltd, Islington
- Hope Agar, Islington
- Hope Print Group Ltd, Islington
- Hopes & Dreams City Ltd, Islington
- Hopkin Murray Beskine, Islington
- Hops 'n' Pops, Islington
- Hornsey Car Parts, Islington
- Hornsey Dental Centre, Islington
- Hornsey Flooring, Islington
- Hornsey Food & Wine, Islington
- Hornsey Halal Grocery, Islington
- Hornsey Lane Estate Community Nursery, Islington
- Hornsey Lane Estate Management Board, Islington
- Hornsey Lane Estate Tenants Association, Islington
- Hornsey Locks, Islington
- Hornsey Metal Works, Islington
- Hornsey Road Pharmacy, Islington
- Hornsey Road Post Office, Islington
- Horrible Productions, Islington
- Hostel Fleming, Islington
- Hot To Go, Islington
- Hot Wire Public Relations Ltd, Islington
- Hot Wok, Islington
- Hotblack Desiato, Islington
- House Of Copiers, Islington
- House Of Copiers Ltd, Islington
- House Of Harlot Ltd, Islington
- House Of Judah Music Studio, Islington
- Househam Henderson Ltd, Islington
- Housing & Property Law Partnership Ltd, Islington
- Housmans (Bookshop) Ltd, Islington
- Howard Brown & Co, Islington
- Howard James & Co Ltd, Islington
- Howdell Ltd, Islington
- Hsbc Bank PLC, Islington
- Hsbc Bank PLC, Islington
- HSBC Bank PLC, Islington
- Hsbc Bank PLC, Islington
- HSBC Bank PLC, Islington
- HSS Hire Shops, Islington
- HSS Hire-Weld, Islington
- HSS Lift & Shift, Islington
- HSS Lift & Shift, Islington
- Huckers, Islington
- Huda News, Islington
- Hudson Architects, Islington
- Hugh Grover Associates, Islington
- Hugh Myddelton Primary School, Islington
- Hugin (UK) Ltd, Islington
- Hugin (UK) Ltd, Islington
- Hula, Islington
- Human Relief Foundation, Islington
- Human Rights Watch, Islington
- Humanscale, Islington
- Hungerford North Drug Project, Islington
- Hungerford Primary School, Islington
- Hunter Security Services, Islington
- Huntleys Food & Wine, Islington
- Huntsmore, Islington
- Hurford Salvi Carr, Islington
- Hurford Salvi Carr, Islington
- Hurford Salvi Carr, Islington
- Husen Moda Ltd, Islington
- Hymans Robertson, Islington
- Hythe Securities Ltd, Islington
- Hyundai Securities (Europe) Ltd, Islington