- Photocentric - 12 Stevern Way, Peterborough, PE1 5EL
- Photochemical Reactors Ltd. - Blounts Farm, Reading, Oxfordshire, RG4 9PA.
- Photofabrication Ltd - 14 Cromwell Road, St. Neots, Cambridgeshire, PE19 2HP
- Photofax Systems Ltd - 8 Brookfield , Northampton, NN3 6WL
- Photogenic - Unit 7 Parc Hafren Industrial Estate, Llanidloes, Powys, SY18 6RB
- PhotoLibrary London - 4th Floor, London, WC2E 9NG
- Photomart - 14 Waltham Park Way, London, Greater London, E17 5DU
- Photo-me International Plc - 3b Blenheim Road, Epsom, Surrey, KT19 9AP
- Photomec London Ltd - Vale House, Kings Lane, Faringdon, Oxfordshire, SN7 7SS
- Photomechanical Services (Essex) Ltd - Unit C, Essex, SS6 7UP
- Photon Beard Ltd - Unit K3, Leighton Buzzard, Bedfordshire, LU7 4UH
- Photon Energy - 8 Windsor Square, Reading, Berkshire, RG1 2TH
- Photon Power Technology Ltd - Suite 8, Brambles Business Centre, Waterlooville, Hampshire, PO7 7SG
- Photon Surgical Systems - Unit W The Old Brickyard, North End, Swindon, Wiltshire, SN6 6QR
- Photonic Products - Sparrow Lane, Hatfield Broad Oak, Herts, CM22 7BA
Companies 1921 to 1935 | Page 129 of 296