At 36 her health is her own responsibility, and you need a booster every 10 years..so even had she been vaccinated as a child, being unlucky enough to stand on a stereotypical tetanus-producing random rusty nail in her 30s would probably have led to the same conclusion anyway
Not true. You need 5 tetanus vaccines (at the correct intervals) to be immunised for life. People who have received the normal UK vaccination regime in childhood and adolescence will have had 5 tetanus vaccines and further vaccines are not usually required - though, to be on the safe side, boosters are given before travel to developing countries (not because the risk of tetanus is higher there but because there may not be access to medical care if you get it).
Had the woman in the BBC story had childhood vaccines, she would almost certainly have avoided the tetanus infection. She was lucky to survive it. Her mother sounds like a total loon.