 Born in Hammersmith, London, Isabelle Westbury experienced a nomadic childhood, living in Mongolia, Malaysia and Syria before arriving in the Netherlands. She attended The British School in the Netherlands from 2001 – 2006. It was in the Netherlands that she first started playing cricket, as she was not allowed to play football at the "very traditional club" near her house. During her time in the country, she played domestic cricket for The Hague Cricket Club. She made her first international appearances at the 2004 Women's European Under-21 Championships for the Netherlands Under-21s, making her debut for the side at the age of 14. Playing as wicket-keeper, she claimed one catch and then scored 15 not out batting from number nine as Ireland won by 98 runs. In the Netherlands' second match of the competition, she moved down to number eleven, and remained unbeaten without scoring when England secured a 219-run victory with over 10 overs remaining. Another loss in the final match of the competition ensured that the Netherlands finished bottom of the table — Westbury scored five runs as no Dutch batsman managed to reach double figures against Scotland.
