Final answer:
Helle Thorning-Schmidt holds the post of Prime Minister in Denmark, and her father-in-law once hoped to hold the same post in the United Kingdom.
Step-by-step explanation:
The post that Helle Thorning-Schmidt holds in Denmark is Prime Minister. Her father-in-law, Kinnock, once hoped to hold the same post in the United Kingdom.
This post is the head of government in a parliamentary regime. The chief executive is typically known as the prime minister, except in countries like Germany where the head of government is called the chancellor.