Calders & Grandidge is one of the oldest established and respected names in the United Kingdom pressure treated timber sector with its own 46 acre site in Boston , Lincolnshire , and employs a workforce of more than 60 members of staff. The company is the main supplier of wooden telegraph poles in the UK and their strategically placed depots are equipped to process, preserve and stock the large number of poles needed to serve UK and overseas markets. The firm’s stock of core products include poles, fencing, gates, railway sleepers and crossing timbers, as well as having its own machining capabilities.