Your friend would be well advised to re-take the test. UKBA does not use overall scores.
The UKBA approved listing states a score of 4 is required for each of listening and speaking.
Since 3.5 is 'technically' equivalent of a pass for level A1 I previously questioned them on it. It took quite a long time and a number of e-mails to get anything close to a real answer, but eventually said that minimum pass at IELTS is scored at 4.0
Submission of a score at 3.5 would need an ECO to act outside of his guidance.
Far too risky in my opinion.