Ray Westlake 
British Battalions on the Somme [PDF ebook] 
Battles & Engagements of the 616 Infantry Battalions Involved in the Battle of the Somme

An account of the infantry battalions belonging to regiments of the British Army and the 63rd (Royal Naval Division) during their service in the Somme area.Although seventy-eight years have passed since the Battle of the Somme was fought, interest in this, the bloodiest battle of the First World War, has never waned. Ray Westlake has collated all the information so painstakingly gathered, to produce a comprehensive compendium of the exact movements of every battalion involved in the battle. This book is invaluable not only to researchers but to all those visiting the battlefield and anxious to trace the movements of their forebears.