HSE website has lots of information to help you with this eg a hazard checklist at http://www.hse.gov.uk/mothers/faqs.htm#q19 Sitting for long periods while travelling would be an issue (which can be addressed by planning the journeys to build in breaks), but I don't see that walking around a well-kept (not full of trip hazards), nearly complete construction site needs to be an issue. You have to think in terms of what hazards it would expose her to. Is your concern about her travelling alone and staying overnight that she may have a miscarriage or go into labour and need help? Having a phone to call 999 and knowing where she is to be able to describe her location would cover that.

R Dean It's likely that some forum users will, like me, wonder why you have been asked to carry out a pregnant worker risk assessment. Surely your role is simply to give professional advice (using established sources of guidance) about the aspects which the woman and her boss (manager/supervisor) need to consider - and keep considering as the pregnancy develops - and act on them accordingly. Also, to echo some responses to past threads about various medical and personal conditions raised on this forum, the woman herself will know best how she is feeling at any particular time (e.g. with regard to fatigue) and therefore, surely, is the best person to make decisions about relevant aspects of her work and liaise accordingly with her boss. The above comments stem from having worked in a local authority with thousands of employees including many women of child-bearing age. Its OS&H team provided a general guidance document which any manager and an expectant employee could read and then discuss and act on whatever aspects were relevant to the particular employee and the nature of her work. I think the guidance explained that such discussions and decisions needed to be repeated as the pregnancy progressed, both at pre-agreed intervals and also by request if the employee thought it necessary. Though this system seemed to work well my colleagues and I occasionally provided specific advice to line managers and/or employees if they asked us for it.

I don't agree that it is surprising to be asked to do such an assessment. Not every organisation will be as well prepared and practised at these things as you would expect a local authority to be!