Complex sentence: At first Yeo-Thomas worked in an administrative capacity, but SOE soon used him as a liaison officer with the Bureau Central de Renseignements et d'Action (BCRA)-the Free French intelligence agency.
Split into simpler sentences: At first Yeo-Thomas worked in an administrative capacity. But the SOE soon used him as a liaison officer with the Bureau Central de Renseignement et d'Action (BCRA)-the Free French intelligence agency.