The contest for the Lady Milne Trophy takes place this weekend in Gormanston, north of Dublin.
The pairs qualified for the team at the trial in January, finishing well clear of the rest of the field.
England are defending champions, with Jane and Gillian part of the winning team in 2013. Catherine Curtis has the distinction of playing in the Lady Milne and Camrose in the same season, the first English woman to do this in many years.
The Lady Milne started in 1934 as the Ladies Championship of the National Bridge Association. (Lady Milne was assistant secretary to the NBA.) It became the trophy for the Ladies Home Internationals in 1950. So far England have won 48 times (including one tie with Scotland in 2011), Scotland 12 times (including one tie), Wales three times and Northern Ireland twice. The Republic of Ireland rejoined the event in 1998.
Play begins on Friday evening and continues throughout the weekend. Matches can be watched on vugraph via Bridge Base Online.