The temporary marriage, or nikah mut'ah, is an ancient Islamic practice that unites man and woman as husband and wife for a limited time. Historically it was used so that a man could have a wife for a short while when travelling long distances. So why are young British Muslims adopting the practice now?
"It allowed us to meet without breaking the bounds of Sharia [Islamic law]. We both wanted to date, to go out for dinner or go shopping and just get to know each other better before getting married, which we wouldn't have been able to do otherwise," says Sara.
She is a 30-year-old pharmacist from Birmingham, a Shia Muslim of Pakistani heritage.