The TURNBALL guidelines (1977) stipulated that, where a case relies wholly or substantially on the correctness of one or more identifications of the accused, the judge should advise the jury of what five points?
1.caution is required to avoid injustice;
2. An honest witness who is convinced they are right, may be wrong;
3. A convincing witness may still be wrong;
4. More than one witness may be wrong;
5. A witness who recognises the defendant, even where the defendant is known to the witness, may be wrong