It is all to do with the new "disclosure of evidence" that has been in place since October. Can't really tell you much more as i have not recieved my training yet. if you are in Strathclyde, i think most of the regular cops have had the training input. As far as I can gather, the defence can ask to see everything now in relation to a case
They can ask, but they might not get.
It's important to note the new disclosure rules (which apply to Solemn cases only at present I beleive) mean only that the police have to reveal all evidence to the Procurator Fiscal. Its ultimately then up to the PF what gets revealed to the defence and what doesn't.
When i saw an incident a while back whilst I was calling to report it, I was starting to write down what I saw and when, I then consulted that whilst the officer took my statement but he said that I should hold onto my own notes incase it went to court because they were like a live version of the events as they took place, and could carry more weight.
If the officer was sensible, he should have seized your notes as a production and kept it himself, referring to it in the report and associated statements.
One of the advantages of my electronic PDA notebook, is that it's bloody hard to work, and if you have particular parts which you might have to reveal in evidence, they just get printed out (with signed authentification certificates) and they're used instead of the original. No defence is seeing any part of my notes that isn't selected by me pretty much