This booklet covers the basic (sometimes called statutory) rights that employers must provide to intended parents who are having a child through a surrogacy arrangement. Your employer may offer better rights than the legal minimum and you need to check your contract of employment or your staff handbook to find out what your entitlement with your current employer is. If you work for an organisation that recognises a trade union you are more likely to have better than the legal minimum rights as unions have pushed for things like higher contractual pay for adoption leave.
The TUC publishes a series of free booklets explaining your rights at work and dealing with other common workplace problems. Know Your Rights booklets