An application made in the course of a criminal proceeding must be made in writing if—
(a) the application—
(i) is made before the prosecution's case opens or witnesses are called; and
(ii) raises any question about the admissibility of evidence, or any other question of law affecting the conduct of the trial; or
(b) the application would postpone or delay a trial that has been listed for hearing if it were granted; or
(c) the application cannot reasonably be made without notice to other parties; or
(d) the application is directed by a judge to be in writing.
Note Pt 6.2 (Applications in proceedings) applies to the application.