Oh dear, oh dear. It seems there is never a year when we don't get these reports. These are the instructions to invigilators given in the Head Teachers' Manual:
WRITE DOWN THE EXACT STARTING TIME ON A TEST RECORD SHEET AND THE TIMES AT WHICH YOU PLAN TO GIVE THE INTERIM TIMINGS.
After 25 minutes say:
You have had 25 minutes, you have 25 minutes left
After 45 minutes say:
You have 5 minutes left
After 50 minutes say:
Stop now please and put your pencils down.
Some schools also add a one minute warning before the test ends.
Please call the school tomorrow, speak to the Head and ask them to confirm that your daughter's report is true, ask them to ensure that the invigilator's report shows that no time warnings were given and, above all, ask them to confirm that the next test will be administered properly. You may even want to email your concerns to the Head this evening (stay calm when writing!), and follow up with a phone call. That gives you a clear paper trail and - hopefully - a reply email.
Please also buy or lend your daughter a watch for the next test. (If it is a digital one, please make sure that any alarms are turned off.)