It’s inevitable when you walk out of an important meeting like an interview to think, doh, why didn’t I mention that! There’s sure to be points you wish you’d stressed or things you missed say. All the more reason to ensure you send a follow up letter.
However, you think the interview went it’s a good idea to send a short follow-up letter – or email – if that has been the form of correspondence you have used. The primary purpose is to thank the panel for their time and to express your continued interest in the role. Be brief and keep it relevant to what you discussed, but it is also a chance to draw their attention to aspects of your application that might not have come up in the interview or to restate points you felt were particularly in your favour.