Hi
@tinka21, I'm type 1 and haven't used mixed insulin for a long time (about 18 years I think) so things may be different now, but I had to have mine 30 minutes before breakfast and 30 minutes before tea, it didn't really matter what time they were, so some days breakfast would be 7am, some days 11am, although tea would be roughly the same time each day. I would be inclined to say it would probably be ok to have your insulin later but I can't say yes it's absolutely fine because I'm not sure.
Do you have a DSN you could ask? Otherwise hopefully someone else will come along and can offer some more up-to-date and accurate advise for you.