Boo, Ok it is Northern Ireland or Ireland pre-partition 1885/7 and the entries appear in both current juristictions, and certs could be now ordered from either Belfast or Dublin. However, to illustrate with the free ones, neither of the marriages have any annotation of anything unusual, despite prosecution and the policeman having asked 'the magistrates for a remand in order that he might get the certificates of the two marriages contracted by the prisoner'.
this is the 1st marriage 1885
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1885/10872/5970674.pdfMarriage 27 Sep 1885 of Thomas Mansell, aged 22, Bachelor & Ellen Jane Collins, aged 22, Spinster. Fathers Matthew Mansell (Builder) + John Collins (Cloth-passer).
and this the second Bigamous one 1887 both under assumed names [the only one that quarter in the church]
Marriage 25 Mar 1887 of Thomas Douglas, aged 26, Bachelor & Mary Flood, aged 23, Spinster. Fathers = Thomas Douglas (Labourer) & Thomas Flood (Carpenter).
https://civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1887/10789/5934783.pdf13 Feb 1891 Recorder's Court & Police Court, Belfast, Ireland.
Ellen Jane Maunsell indicted with having committed bigamy by marrying Thomas Douglas Harvey in Drew Memorial Church, Belfast, on 24 Mar 1887, her former husband, Thomas Maunsell, to whom she was united on 27 Sep 1885, in St Anne's, being still alive.
https://www.findmypast.co.uk/transcript?id=BL_0001631_18910214_074_5698interesting in that 1st husband conned her into original marriage by faking a letter that her soldier 2nd husband and sweetheart had been killed, then left her and apparently disappeared, turning up again 1891 - bottom right column under Police Courts rather than the highlighted bit. She pleaded guilty and was allowed out on her own recognisances a £20 bond for judgement at ten days’ notice. I never found a later report with sentencing so I guess she was also bound over rather than imprisoned.
https://search.findmypast.co.uk/bna/viewarticle?id=bl/0000434/18910206/169I could view the images for £2.50 each online or order full paper certs on GRONI website too (as below) & although civil registration started much later then England otherwise the format and proceedures seem effectively the same.