They must be offered a free health check and this should be followed up at regular intervals. They don't have to take the offer up, and a questionnaire is only one way of doing the check,

John

As it appears that you are in waste management you will almost certainly fall into one of the categories that the current ACoP for COSHH list as being where health surveillance is required.

Take a look at this extract:
==
Examples where health surveillance is appropriate under the criteria in regulation 11(2)(b) are:
where there have been previous cases of work-related ill health in the workforce/place;
where there is reliance on PPE, eg gloves or respirators, as an exposure control measure; eg printers wearing gloves to protect against solvents used during press cleaning, or paint sprayers using two-pack paints wearing respirators to prevent asthma. Even with the closest supervision there is no guarantee that PPE will be effective at all times;
where there is evidence of ill health in jobs within the industry; eg frequent or prolonged contact with water (termed ‘wet-working’) causing dermatitis in hairdressers and healthcare workers, or breathing in mists from chrome plating baths causing chrome ulcers in platers.
==
So IMO you should already be doing regular health surveillance on all employees covered by the above, not just night shift workers.

Chris

Thanks everyone. I used to be in waste management, now I'm doing something completely different!