The London Pack is the largest in England, numbering twelve once Biffy undergoes metamorphosis. Three members of the pack serve the Bureau of Unnatural Registry in the London office. Lord Maccon, the Alpha, is head of the London BUR office; Professor Lyall is Beta, his second in command, a field agent and Secretary Prime. Woolsey is the only pack that splits for military service. Several members serve with the Coldsteam Guards—one of the army regiments—including the current Gamma, Major Channing. At the start of Changeless, half of the pack has returned from a tour of duty in northern India. Both Lord Maccon and Professor Lyall have served with the regiment in the past.