Example case - B & L v the United Kingdom [2005]

   English law prevented a parent-in-law from marrying their child-in-law
   unless both had reached the age of 21 and both their respective spouses
   had died.

   B was L’s father-in-law, and they wished to marry. L’s son treated his
   grandfather, B, as ‘Dad’. The court accepted the Government’s argument
   that the law had the valid aim of protecting the family and any