Only The A F D Can Save Germany
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No best answer has yet been selected by lsm123. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.As the book is pre war and fan ovens I assume were not around then.
I came across a leaflet in Asda which explained cooking times. It said for fan assisted ovens you should reduce the cooking temperature by 20 degrees.
Therefore..350F= 180C =160C in a fan oven
450F= 230C = 210C in a fan oven
Hope this helps