[asselinpaul]

I am currently in Year 13 in London. You are definitely allowed TI in the mathematics exams (A-Levels). TI-89 is one of the only that is banned because of its CAS.

Friends in the French system are allowed the TI 89 though.

[x0054]

Just an hint, you can swap the guts of a TI-89 into the body of a TI-83. Don't ask me how I know :)

[burriko]

Yep, I did Maths A-level in the UK back in the 90s, and a TI graphing calculator was basically a requirement for the exams.

[fophillips]

Interesting, I wasn't allowed to use one in A-Levels or university exams.

[glomph]

I think it depends on the modules/exam boards.