'Owen Roe (I)''s character who appeared once each in the first and third seasons was originally named Sean Dooley, but when he returned as a regular character late in the fifth season, his name was switched to Paul Dooley because Lorcan Cranitch's character Sean Dillon had been introduced in the third season.
Although the Comic Relief crossover episode "Ballykissdibley" has never been officially re-broadcast as part of The Vicar of Dibley, or Ballykissangel, series canons, it is possible to find this charity episode online on certain video streaming websites.
For BBC's Comic Relief 1997, The Vicar of Dibley did a short cross over episode called Ballykissdibley featuring Peter and Assumpta. Although it has never been officially re-broadcast as part of The Vicar of Dibley, it can be found on certain video streaming websites. This for charity episode does imply that the 2 series exist within the same fictional story universe.
The trivia item below may give away important plot points.
Although the series was never intended to have a dark subtext, as it was a relatively light sunday evening drama series, in the decades following the original broadcast, later revelations and allegations regarding the Roman Catholic Church in Ireland have since given the series a much darker subtext undertone for certain stories and characters, that was probably never originally intended.