She was born in Dartford in Kent[2] as Edith Doreen Allchin, one of ten children of Mary Ann née Amos (1838–1924) and John James Allchin (1836–1903), a builder. In 1905 she married Melville Hodsoll Allen (1879–1932) who worked at the Stock Exchange in London[3] and who served in World War I as a captain in the Queen's Own Royal West Kent Regiment.[1]
Following her arrest in March 1912 for taking part in a window smashing campaign she appeared at Bow Street Magistrates' Court on 12 March 1912, before being sent for trial at the London Sessions on 19 March 1912, when she was sentenced to four months imprisonment in Holloway Prison;[4] in prison she went on hunger strike and was force-fed.
When WSPU leader Emmeline Pankhurst returned to Great Britain from America in late 1913, she was met at Plymouth by a group suffragettes which included Doreen Allen. As Pankhurst disembarked from the Majestic she was arrested under the Cat and Mouse Act and taken to Exeter Prison.[1]
in her later years Doreen Allen lived in Brighton in Sussex. She died in June 1963.[8]
Her nephew was Sir Geoffrey Cuthbert Allchin KCBE, CMG, MC (1895–1968), British Ambassador in Morocco.