I’ve done mine 2 weeks ago and it was exactly as
@MiNi just said. Bullet points is your best friend for that part of the assessment. Focus only on the main information, what happened, the numbers/codes, what actions were taken before and after the accident, what the driver requires and in my case as I can remember no injured during the accident but British Transport Police would have to come to the place.
I’ve bought the tests and they we’re very helpful, specially in terms of knowing what to expect and practicing to be more accurate and fast. Accuracy is the key and practicing everyday you get faster and more used to the symbols. On the day of the assessment there will be 2 blank A4 sheets on top of the table, I used one of them to block the bottom line whilst I was crossing the one above and it helped me so much as you don’t get distracted by other symbols.
Have a look on the Group Bourdon Tool, you can print the pages and practice as well.
Good luck!