This is an article on a US study on cancer sufferers who then seek to adopt. I've no idea if there is a comparable British study. Do UK prospective adopters who have survived cancer face discrimination? I've not seen any literature on the topic. Maybe the study and articles on it will lead to a research project.
Infertility is a risk for cancer survivors due to the side effects of chemotherapy. Although there are a growing number of fertility treatments now available, the permanent or severe nature of a patient's infertility can leave adoption as the only option available for those wanting to start, or add to, a family.