Sultanas are dried green grapes, called golden raisins in the States. "Regular" raisins are dried red grapes. Dried currants are dried currants, not grapes. Candied peel is either lemon or orange peel. Some of the big spice companies sell it already cut up into little pieces for you (otherwise, try a candy shop.) Incidentally, I read someplace that the meaning of the word "plum" in terms of puddings is disputed. Obviously, it doesn't mean fresh plums. Some sources say it refers to prunes (dried plums), other say it refers to raisins.

I love making plum pudding!