Digital surrogate of poster: 'Mae angen Casglwyr ar Frys ar gyfer Wythnos Oxfam Wythnos Oxfam Hannercamlwyddtant 1-10 Hydref - Mae'n amser am Decach Byd', with silhouette of people walking down steps carrying baskets and water jugs. Green background, black, white and yellow text. Part of Oxfam's 50th anniversary: It's time for a fairer world series.