Eggs size

[hillbilly]

Is a size 2 egg the same as a medium egg? Just about to make the icing for my Christmas cake and Delia's instructions are to use size 2 egg whites.

I think a sz 2 must be medium but I am not an eggspert (sorry, couldn't resist!)

size 2 is large

Haven't paid attention to egg sizes for years. No harm seems to come of it.

thanks!