Yes, he is the father and it's proved officially
So do what the above posters suggest. Nail him in the Polish courts and via the CSA in England.
sting him for all you can get
The guy has a moral responsibility to pay for his child but let’s not milk the guy to death.
The welfare of the child is paramount
OK here is the controversial bit: It’s almost impossible to argue against the sentiments of this statement and that is why the people who draughted the legislation use it. It’s a meaningless phrase that appears to say a lot but is in fact hollow. It’s a device where by the state and parent "without care" can effectively wash their hands of the problem.
Don't be too honest either about your alternative sources of income
WTF!! You typed that...