That Catholic League article erroneously mentions the BBC 9 times, Father Ted was made by an independent company and broadcast on the (non-BBC) Channel 4.
Anyway, while checking that on Wikipedia I came across this -
"It is probable that the name of the seminary known as St. Columb's, which Ted and a number of other priests in the show attended, was influenced by the name of St. Columb's College in Derry, Northern Ireland, of which Seamus Cassidy, a Channel 4 producer, was a past-pupil."
I had to laugh because Seamus Cassidy was in fact the Commissioning Editor for Channel 4 not "a producer".
I dare not delve deeper into this miasma of mis-information.