The title refers to the Robert Burns poem, "Ae Fond Kiss".
Contrary to what he states, the sweet dish Casim serves Roisin is 'Ras Gulla', not 'Gulab Jabun'.
All Eva Birthistle knew about her character prior to filming was that she was a school teacher. Ken Loach only shared the first 40 pages of the script with her - she had to figure out the rest herself.