TENET® and TENASTIC® are the brand names of the London Letter File Co Ltd.

Founded in 1921, the Company has been trading for over 98 years, manufacturing and supplying letter files, boxes and binders to all types of commercial, industrial and professional companies. Today the Company is owned and managed by Geoff Crowther, the grandson of the founder, Guy Philip Robinson.

Our London and South Midlands factories are modern and capable of very high quality production.

The Directors insist on regular investment in plant, new processes, materials and training to ensure that everything that leaves the factories will fully satisfy our customers.

We have a responsible approach to the environment. Use of recycled plastic, paper and packaging materials and energy saving schemes are all employed, together with control of water and air emissions.

We use our own unmarked delivery vehicles wherever possible backed up by efficient contract carriers.


Our sales staff have over forty years experience in this trade and are delighted to offer you their guidance with your enquiries. We always keep a close track on your orders and keep you informed of their progress. After all, we want you to keep coming back to us time and time again!


Our artwork/design studio has the latest in computer software to turn your design ideas into reality. We offer you technical support from your first enquiry and right through the production process. This way you'll get the quality and look of product that you want.


Today we can offer a comprehensive range of services and manufacturing processes to you. In addition to our traditional manilla, board, PVC and polypropylene ranges we have printing facilities including foil blocking, screen printing and a range of finishing styles to give that extra touch of class.


Our factories have a quality control system in operation that complies with industry standards. We are committed to supplying you with a product that not only meets your expectations but also exceeds them.