I've always used conventional ovens and never cooked in a fan oven. But the new swizzy oven I was planning on buying has 2 ovens, one of which is only a fan oven and you can't switch the fan off. Can I easily get used to using a fan oven instead? I don't want to have to learn a whole new way of cooking and spend ages getting used to the thing. Also, do food labels now always include instructions for fan ovens? They always used to say something "fan ovens need less cooking time/lower temperatures", leaving it up to you to guess how to cook it - and I can't be doing with that!