Even if you have come under your own steam and have your own transport, you can hire English-speaking guides for the day or half-day once you get there. Some may be British ex-pats who have chosen to live in the Somme, whilst others will have excellent English and a comprehensive knowledge of the events of 1914-1918 and can tailor your tour to suit your requirements.
A number of guides are available to be booked either through the various Tourist Offices or direct.