Congratulations on your 20th wedding anniversary and what a lovely way to mark this occasion by renewing your vows!
I know you mentioned a small church but might I suggest a slightly more unique location on the North Coast of Northern Ireland? Mussenden Temple is located in the beautiful surroundings of Downhill Demesne near Castlerock in County Londonderry. It perches dramatically on a 120ft cliff top, high above the Atlantic Ocean on the north-western coast, offering spectacular views westwards over Downhill Strand towards Magilligan Point and County Donegal.
The temple was built in 1785 and forms part of the estate of Frederick Augustus Hervey, Bishop of Derry and Earl of Bristol. Built as a summer library, its architecture was inspired by the Temple of Vesta in Tivoli, near Rome.
Both the temple and the surrounding views are among the most photographed scenes in Ireland and the temple itself is available for civil wedding ceremonies through arrangement with the National Trust!
Should you have any further questions about any of the above, please get in touch with Coleraine Visitor Information Centre and we will be happy to help. We also offer an accommodation booking service - https://www.visitcausewaycoastandglens.com/