I'll hold off on it now I think. He doesn't have any allergies that we know of and only had a tiny amount of excema when he was a newborn.

I have had a nurse say that if he eats arrowroot biscuits, they are made with egg, so if he hasn't reacted to those then you should be O.K. He also had a bit of banana bread (thanks to MIL) that would have definately had egg in them.
Zucchini Slice has 5 eggs in it which is probably too much to begin with. Might give him some toast fingers with the yolk on it to start as that is something he can hold as well I guess.

Thanks for your replies