SWMBO and I occasionally like sausages with something for a meal.
Generally we've settled for Richmond Thick sausages, and from chilled, I can oven cook them in 30 minutes gas mark 6.
Recently, decided to investigate their pre-frozen sausages (cheaper !). Cooking instructions are "from frozen, gas mark 4, 25-30 minutes".
We tried this, and it was woefully too low/to short. (Ended up having to be 45 minutes).
a second run, gave us .... 30 minutes gas mark 6 !!!!!
Meaning there was no difference cooking from frozen or chilled.
Presumably the heat required to defrost the things isn't as much as you'd expect ?
All very odd.