This is the CPS guidance from their manual:
Primary disclosure
1.9 The prosecutor's statutory duty to disclose unused material to the defence is triggered by:
• a plea of not guilty in the magistrates' court
• (more wording about Crown Court cases)
When this occurs the CPS must provide the accused with primary disclosure. This obligation exists irrespective of any action by the defence.
1.10 Primary disclosure means providing the defence with any prosecution material which has not previously been disclosed to the accused, and which in the prosecutor's opinion might undermine the case for the prosecution against the accused. If there is no such material the prosecutor must inform the defence in writing. Disclosure to the defence must take place as soon as reasonably practicable after the duty arises.
So, as usual things are wooly. In my area, CPS take the view that it impractical for the prosecutor to leave court and copy all the documents, not to mention checking them for sensitive material that should not be disclosed and removing them, whilst keeping the court waiting for the next case to start. Remember each defendant may well have a solicitor, but there is only one prosecutor in court.
Maybe things are different in your area, Bristol.Red, but it may also be that there had been some correspondence between your solicitor and CPS prior to court, so they turned up ready to do the disclosure. It boils down to what is "As soon as reasonably practicable".....
Also:
Quote from Bristol.Red:
Often the mickey mouse magistrates court tells the cps to serve these documents a lot earlier than 7 days prior to trial. The CPS often ignore this as in my case, my trial was due on the Monday, the cps had not served the documents on the Thursday. My solicitor put an application in on the Friday to have my trial "Vacated". The cps served the papers on the Friday. No witnesses turned up on the Monday.
I am not going to tell you guys decide what the outcome was.
That re-enforces the theory of pleading not guilty until that last possible moment, because the ineptitude of the prosecution system known no boundaries. If you had gone guilty to get a discount, you would never have had the benefit of the cock up they made!