In RISE AND FALL OF THIRD REICH it was said that Hitler nixed idea of destroying Brits army cause he didnt wast the Belgians to think he was trying to annhilate all of his enemies or conquered nations. He wanted some cooperation from the Belgians...also he wanted Britain to withdraw from war effort from beginning of war...and he knew the Brits would adamantly pursue war if he annhilated army..and Hitler didnt want a 3 front war (eastern front...western front...and southern front)...He knew he would be unable to supply all his armies...I recommend a read of that book to fill in lots of the glossed over poorly informative baloney that is being passed off as history..
Hitler was an Anglophile. He really felt the two countries and peoples , Britain and Germany were alike.