MyQul
Chairman of the Bored
Just had a quick read online I am not familiar with the terms bitter and milds when talking beer styles. Bitter being a light pale ale.
Your right. Bitter is a bit of a catch all for quite a range. The basic bitter grist is pale malt + some crytal malt (althouth you can even leave the crystal out). An irish red ale adds a small amount of roast barley for the red colour and uses Irish ale yeast