Hello dathai, many thanks for all the help. The tree is now looking very healthy.
Interesting that Ann Barr nee McLaughlin's age at death in 1924 (73) puts her YOB c. 1851. If Catherine McLaughlin nee Brogan was Ann's mother, Catherine would be 13 when Ann was born (given Catherine's death age of 80 in 1918 is correct). I wonder if Catherine was a second marriage for Daniel.
Also the witnesses to William Miller and Giles McLaughlin's marriage in 1879 were Anthony and Anne McLaughlin and wonder if Anthony was another brother or perhaps an uncle. Can't find a civil marriage for them so perhaps an older couple married RC pre-1864, or not married and some other relationship.
I've certainly got a lot further forward with this line than I expected so thanks again for your help.