From midnight on Wednesday, the teachers can see our results (but doubt many of them will be looking at that time). They can also see the grade boundaries, mark schemes, examiner reports etc
For AQA, the website says that the GBs get released to us at 8am on Wednesday, but last week for the A Level ones they replied to someone on twitter that it would be at 9:30am so that confused people. At the same time, you will be able to use the UMS converter to convert any scores from your CAs into UMS and see what you need to get from your exams the next day.
Hopefully that cleared it up a little, however this may be slightly different for your boards.