DH runs a small business. He employs 2 full time staff one of whom plans to TTC next year. The work by its nature is very physical - heavy lifting, on feet all day, using sharp tools - it wouldn't be suitable for a pregnant woman so DH couldn't amend her duties. What happens in this scenario?
If no adjustments to duties or other adjustments to the working environment would make the job doable, he'd need to find her something else to do. If there is literally no other work she could do, he would need to sign her off on health and safety grounds on full pay.
There is loads about health and safety and pregnant employees on the HSE website.
Thanks flowery - it's a butchers shop so they cut and lift heavy carcasses, there wouldn't be any other duties. So he'd have to pay her and employ someone else - I don't think his business could sustain that