Sorry I had to go out and enjoy myself.

I was asking about Pace egging rather than Mummers Plays. Thanks for the links to Eddie Cass:

Cass is inclusive of people with differing beliefs regarding origins of the plays, but follows recent authors in rejecting the theory that they are pagan or pre-Shakespearean relics. However, he is among the first to suggest alternatives. He proposes that the drama derived from the theatre booths of eighteenth-century fairs, evidenced, for instance, by the example of John Edwin in 1770.

But giving eggs at Easter is a bit odd and a bit old. So, is it a pre-Christian survival?