Ainsworth grew up in Southampton, England and lived in a guest house run by his mother, who is from the Seychelles, and his father.

[3][8] Ainsworth says his approach to cooking at Number 6 is to "source amazing local, seasonal ingredients and serve them in a simple modern style.

[3][9] It is included in the Good Food Guide's top 50 UK restaurants with a rating of 7 out of 10 and describes Number 6 as "Padstow's premier gastronomic address".

[10] In 2011, Ainsworth competed in the BBC's Great British Menu, winning the dessert course with a dish called Trip to the Fairground.

[11] In 2017, Ainsworth also appeared as a guest chef on the TV series MasterChef, creating dishes for the US Ambassador to the UK, cooked by the show's contestants.