The revised CDM regulations will come into force as planned tomorrow in spite of client concerns.

The changes are designed to simplify and improve on-site health and safety management but client bodies are predicting difficulties.

The key amendment makes the client reponsible for checking the competence and resources of appointees to each project rather than relying on an agent.

The pre-tender health and safety plan formerly prepared by designers has been replaced by a requirement that the client provide designers and contractors with more detailed pre-construction information.

James Preston-Hood, chairman of the health and safety committee at the Construction Clients Group, said many UK businesses had not taken on board the implications. He said: “Larger clients are probably aware of the changes but it is a specific challenge for businesses whose core trade is not in construction.”