Catholic Culture : Document Library : Decree on the Gift of an Indulgence during the 'Year of the Eucharist':
"2. A Plenary Indulgence is also granted to the clergy, members of Institutes of Consecrated Life and Societies of Apostolic Life and to the other faithful bound by law to recite the Liturgy of the Hours, as well as those who are accustomed to praying the Divine Office for pure devotion, every time, at the end of the day, when they recite Vespers and Compline before the Lord present in the tabernacle, either in community or privately."
I'm not sure if the Bp. of Rome intends for this to apply to the faithful in the Anglican Church, but maybe it does. Does Evening Prayer count?