Company Index
- H and M Display Ltd - York
- H and O Plastics - Birkenhead
- H and S Polythene Ltd - London
- H and T Components Ltd - Swindon
- H H I Building Products - Lisburn
- H L Ravenscroft Plastics Co Ltd - Tewkesbury
- H W Rowe - Preston
- H Wicks (Lindal) Ltd - Barrow in Furness
- Hadleigh Enterprises Ltd - Wickford
- Haffenden Moulding Co Ltd - Sandwich
- Hales Tool and Die Ltd - Maldon
- Hallam Plastics Ltd - Nottingham
- Hallam Polymer Engineering Ltd - Dronfield
- Hallite Seals International Ltd - Hampton
- Hallplas - Leicester
- Halo Reflective Wear - Nottingham
- Halyard (M and I) Ltd - Cerambond Division - Waterlooville
- Hamilton Machinery Sales Ltd - Aylesbury
- Hamlin RPD Ltd - Leamington Spa
- Hammerton and Son - Lincoln
- Hampson Composites Ltd - Bolton
- Hampton Colours Ltd - Stroud
- Hancock Plastics Ltd - Ashton under Lyne
- Handlestore Com - Birmingham
- Hangers Nest Ltd - Woodford Green
- Hanmere Polythene Ltd - Letchworth
- Hanson Thorpe Precision Toolmakers Ltd - Manchester
- Happich Profiles Ltd - Birmingham
- Happich Vehicle and Industrial Components Ltd - Birmingham
- Happy Pet Products Ltd - Leicester
- Harboro Rubber Co Ltd - Market Harborough
- Hardie Polymers Ltd - Glasgow
- Hardigg UK Ltd - Ashford
- Hardy and Hanson Ltd - Dewsbury
- Harltex Ltd - Northampton
- Harold Moore (Injection Mouldings) Ltd - Sheffield
- Harrison Europac Ltd - Sutton
- Harrison-Verity Products Ltd - Blackburn
- Hart Coating Technology - Brierley Hill
- Harvest Polymers Ltd - Farnham
- Harveys Ltd - Edinburgh
- Hasco-Internorm Ltd - Daventry
- Haven Windows and Plastics - Milford Haven
- Haverhill Mould and Tooling - Haverhill
- Hawk Mouldings - Hayling Island
- Hawkes Technical Ltd - Wellingborough
- Hayes Engineering Services Ltd - Cardiff
- Haywood Products Ltd - Stafford
- Haywood Rotomoulding Ltd - Rochdale
- Hazelhurst - Darwen
- HCL Fasteners Ltd - Radstock
- HDS Design Consultants Ltd - Rochford
- Heathcote Industrial Plastics Ltd - Newcastle under Lyme
- Heaven Dowsett and Co Ltd - Birmingham
- Hebble Plastic Coatings - Halifax
- Heinsco Ltd - Rochdale
- Helix Ltd - Stourbridge
- Hellermann Ireland - Dublin
- Hellyar Plastics - Whitstable
- Henderson Plastics Ltd - Dereham
- Hendley Engineering Co - Loughton
- Henley Precision Mouldings Ltd - High Wycombe
- Henri Picard and Frere Ltd - Dorking
- Henry Lenox Industrial Ltd - Hampton
- Hensons - Wigston
- Hepworth Building Products Ltd - Composites - Burnley
- Hepworth Building Products Ltd - Drainage - Sheffield
- Heritage Dove Plastics - Nottingham
- Hermetic Rubber Co Ltd - Edgbaston
- Hertfordshire Window Co Ltd - Letchworth
- Hesketh's Plastics - Liverpool
- Hexcel Composites - Cambridge
- Hexham Developments Ltd - Hexham
- HH Plastics Ltd - Walsall
- Hi Class Machinery Ltd - Wellingborough
- Hi Spec Plastics Ltd - South Shields
- Hi Tec Window Films - Wolverhampton
- Hi-Profile Plastics - Gateshead
- Hi-Tech Coatings Ltd - Aylesbury
- Hi-Tech Design Ltd - Waterlooville
- Hi-Tech Moulding Ltd - York
- Hi-Tech Mouldings Ltd - Waterlooville
- Hi-Tech Plastics - Blackburn
- Hi-Tech Polymer Proofing Ltd - Warrington
- High Frequency Services - Rochdale
- High Profile Extrusions Ltd - Droitwich
- High Profile Plastic Products Ltd - Banbury
- High Street Designs - Rushden
- High Tech Tubes Ltd - Byfleet
- Highbury Hose Ltd - Swadlincote
- Highwood Consultants Ltd - Ryde
- Hilbar Plastics - Manchester
- Hillberry - Ellesmere Port
- Hillside (Mouldings) Hereford Ltd - Hereford
- Hillside Plastics Ltd - Durham
- Hilton Docker Mouldings Ltd - Rochdale
- Hilton Engineering - Havant
- Hispack Ltd - Billericay
- History Craft Ltd - Cirencester
- Hiva Products - Leicester
- HK-Plastics Ltd - Runcorn
- HL Display - Shipley
- HL Plastic Ltd - Derby
- HL Ravenscroft Ltd - Tewkesbury
- HLB - Burntwood
- HLN Supplies - Leeds
- HM Foam Distributors Ltd - Calne
- HMT Plastics Ltd - Uckfield
- HN Reprographics - Leicester
- Hobelt Rubber Company Ltd - Sutton Coldfield
- Hoerbiger Rings and Packings Ltd - Gosport
- Hofbauer (UK) Ltd - Gloucester
- Holfeld Plastics - Burton on Trent
- Holland Colours Ltd - Gillingham
- Holland Plastics (UK) Ltd - Clacton on Sea
- Holloid Plastics Ltd - Basingstoke
- Holloway Plastics Ltd - Walsall
- Holmbush Manufacturing Co - St Austell
- Holmes and Langston Trade Frames - Belfast
- Holmes Hose Ltd - Sandbach
- Holplas Services - Blackburn
- Holscot Fluoroplastics - Grantham
- Holt and Macintosh (Waste Plastics) Ltd - Blackburn
- Home Improvement Supplies - Brighouse
- Home Supplies (Wessex) Ltd - Ashford
- Homecare Products - Ipswich
- Homelux Nenplas - Ashbourne
- Homestyle Direct Ltd - Romford
- Honeycrown Ltd - Wrexham
- Hopehurst Ltd - London
- Hornby Hobbies Ltd - Margate
- Horne Engineering Services - Walsall
- Hose and Tubular Services - Luton
- Hose Component Supplies - Sheffield
- Hose Tech Ltd - Wigan
- Hoselines and Industrial Supplies Ltd - Salford
- Hot Runner Systems (HRS) - Ashford
- Hotshot Plastics Ltd - Manchester
- Hotspot Tooling Ltd - Leicester
- House of Anderson (1905) Ltd - Morecambe
- Howard Plastics Ltd - Tewkesbury
- Hoylake Plastics - Wirral
- HPL Jars and Containers Ltd - Liverpool
- HPM Ltd - Nottingham
- HQ Lacquer Ltd - Chessington
- HSP Plastics plc - Havant
- HTL Ltd - Stoke on Trent
- HubAds - Welwyn Garden City
- Hubron (International) Ltd - Manchester
- Huhtamaki UK Ltd - Gosport
- Hunt Brothers - Hinckley
- Hunter Plastics Ltd - London
- Huntsman - Scunthorpe
- Huntsman Advanced Materials - Cambridge
- Huntsman Polyurethane UK Ltd - Shepton Mallet
- Hybrid Technology Services Ltd - Yate
- Hydralon Ltd - Southampton
- Hydraquip - Gatwick Hose Service Ltd trading as - Crawley
- Hydrasun Ltd - Aberdeen
- Hydrasun Ltd - Glasgow
- Hydro Polymers Ltd - Newton Aycliffe
- Hydrodif Products Ltd - Ipswich
- Hydrophilm Ltd - Stevenage
- Hymid Multi-Shot Ltd - Brixham
- Hyperlast Ltd - High Peak
