"Rejoicing Buns"

Re-reading the book 'Oxfordshire: A Pocket Guide' (by Carole Chester) there is a mention of the Abingdon tradition of Bun Throwing on page 13 in the Gazetteer section.

Interestingly the tradition is described as "The curious custom of tossing 'Rejoicing buns' from the roof on special occasions...". I've never heard of the event's buns being called 'Rejoicing buns' before. It also states the events have taken place since 1820, rather than the recorded date of the first Bun Throw in Abingdon in 1761.