Curtis May participated in the March 22--27 events in London marking the 200th anniversary of the abolition of the slave trade in England. One of the main features of the commemoration was a prayer walk along the Atlantic slave trade route on both sides of the Atlantic. ORM (Office of Racial Reconciliation) participated in the walk in 2004 in Virginia. This 7-year walk, which included the U.S., South America, the Caribbean, West Africa and the UK ended in Westminster with a final celebration. The work of William Wilberforce and other abolitionists was highlighted through speeches, songs and drama.

Among the thousands attending the 200th anniversary celebration on March 25 were the Archbishops of Canterbury, York, West Indies and West Africa. Archbishop Rowen Williams of Canterbury affirmed his 2006 apology on behalf of the Church of England for its involvement in the slave trade and its ownership of slaves. It had not made such an acknowledgement prior to last year. Williams felt that the "stain" needed to be removed from the church. The mission statement of Lifeline Expedition Ministry, which led the march is "Healing the Past—Transforming the Future."

Another important feature of the London commemoration was the emphasis on the need to call attention to present-day slavery and the 27,000,000 people currently being held in slavery around the world. A number of anti-slavery ministries took part in the week’s events.