Alex was part of a group of backbenchers who successfully campaigned for an ivory trade ban.
Now, the UK's ivory ban has come into force and prohibits dealing in ivory items unless they meet one of five narrow exemptions. Sanctions have also been introduced to ensure robust action can be taken against those who breach the ban.
This means the UK now has one of the toughest ivory bans in the world.
Alex said: "After a long campaign, the world-leading Ivory Act coming into force represents a landmark moment in securing the survival of elephants across the globe for future generations.
"As one of the toughest bans of its kind, we are sending a clear message that the commercial trade of elephant ivory is totally unacceptable.”