Music
"...If music be the food of love..." Some of these were included on the day; the service sheet may be downloaded (blue arrow, bottom right) - please note the lyrics in copyright have, of course, been redacted, along with The Well's CCLi licence number.
God's Great Dance Floor, possibly with some choreography
Carols - well, the refrain of Adeste Fideles in most of the languages represented on the day (pic, right, courtesy Ian Prescott)