Rubuta ci gaba don wannan sakin layi - Yawancin ma'adinai sun shiga CPGB saboda shigar da jam'iyyar ta yi a cikin Babban Yajin Aikin Burtaniya na 1926
Ka yi haƙuri. A cikin 1930 CPGB ta kafa "Daily Worker" (" Morning Star "), wanda ya tsira daga jam'iyyar kuma a halin yanzu shine jaridar gurguzu mafi girma kuma mafi tsayi a tarihin Burtaniya. A cikin 1936 da yawa daga cikin mambobin jam'iyyar sun kasance a wurin a yakin Cable Street, suna taimakawa wajen shirya juriya da kungiyar Fascists ta Burtaniya. A lokacin yakin basasa na Spain CPGB ya yi aiki tare da USSR don ƙirƙirar Brigades na Duniya, suna daukar sama da rabin membobin 2,500 na Battalion na Burtaniya, wanda mai fafutukar jam'iyyar Bill Alexander ya umurce shi daga baya. A lokacin yakin duniya na biyu, wasu matasa masu fafutukar CPGB da wani matashi Norman Le Brocq ya jagoranta suka kafa kuma suka jagoranci juriya kan mamayar Jamusawa na Jersey, suna kirkirar Jam'iyyar Dimokiradiyya ta Jersey ga bangarori daban-daban na juriya. Manyan masu fafutukar CPGB sun shiga cikin zanga-zangar neman damar jama'a zuwa wuraren ɓoye bam, shirya kwashe yara miliyan 3 zuwa ƙauyuka, kuma sun shiga cikin tattaunawar bayan yaƙin game da sake fasalin ilimi da ƙirƙirar Sabis ɗin Kiwon Lafiya na Burtaniya (NHS). Bayan nasarar da aka samu a kan Nazis a 1945, membobin CPGB sun kusan ninka sau uku bayan karshen WWII, suna kaiwa ga shahararsa.