The traditional British hard cheeses were
Caerphilly (white, crumbly, great for toasting)
Cheddar (deep yellow, hard, can vary from mild to very strong)
Cheshire (white, crumbly, salty)
Double Gloucester (gold, hard, buttery)
Lancashire (white, crumbly, mild but rich)
Red Leicester (red, hard, mild)
Sage Derby (white/green, hard, mild, herby)
Shropshire (orange, hard, mild)
Wensleydale (white, crumbly, creamy)
but there has been an explosion of cheese-making and they reckon there are about 700 varieties now!