Solution

38510

First name
Alex, Tess and Rebecca
School
Wimbledon High School
Country
Age
10

Every equasion resulting in £5 credit in Alison's bank account will start in a number that ascends in multiples of 3 from the starting digit 4. For example- if x is deposit and y is withdrawal, then 4x + 1y = £5. This pattern will occur infinite times.