I have a few bits from Waitrose (party nibbles)

If there is no instructions 'from frozen' on the sleeve does this just mean you cook them the same as you would not from frozen?

Also I have some mini hamburgers and they only have microwave instructions? Does that mean they are cooked from frozen in the microwave??

When do you want them for as you could defrost them. Defrost in the fridge over night or in the microwave if you want them quick.

If you want to cook them from frozen then you'll obviously have to add time on. If you have no instructions then you'll just have to keep checking them or use a thermometer.