'Majlis Ansarullah UK' is an auxiliary organisation of the main 'Ahmadiyya Muslim Association UK', UK,' the latter being a branch of the worldwide Ahmadiyya sect of Islam. All Ahmadis who are forty years of age or over, automatically become members of 'Ansarullah.' 'Majlis Ansarullah,' like the main body of the Ahmadiyya Muslim Community - to which it is subordinate - is a non-political, religious and spiritual organisation. It has nothing to do with politics of any sort.

The number of Ahmadis in UK grew gradually, predominantly as a result of migration from different countries such as Pakistan, India, Bangladesh, Germany and Africa. 'Majlis Ansarullah' came into existence in UK simultaneously with the main body of the Association, perhaps in the nineteen sixties (1960s).

The aim of the organisation is the moral and spiritual training of the members so as to promote the love of God, righteousness, exhorting them to discharge their duties towards the Creator and fellow human beings; promoting and propagating religious knowledge; serving humanity; religious training and education of children, particularly teaching them Namaz and Quran; inculcating obedience to Hazrat Khalifatul Masih of the time and Jamaat's administrative setup at all levels and tires etc.

The aims and objectives of the organisation are reflected in the pledge, which every member has to make and repeat in every formal meeting.

The 'Ansarullah' functions are according to its constitution, which is approved by Hazrat Khalifatul Masih, the supreme leader of the worldwide Ahmadiyya Muslim Community. The constitution lays down rules for the appointment of office bearers; the structure of the organisation; designation if the office bearers at different levels and their responsibilities; powers and duties of 'Majlis Shura' (a national consultative body, which recommends amendments in the constitution and programme of any particular activities for the next year); and general guidance. All elections and proposals passed by the Shura carry the status of recommendations to Hazrat Khalifatul Masih, whose decision in every matter is final.

Among the 'Ansars' there are two levels/rows (Saffs).

The 'Saff-e-awal' comprises members of age above 55 years while all others from 'Saff-e-doam.

The Sadr and Naib Sadr (Saff-e-doam) are elected for a period of two years, while all other office bearers are appointed on the kind approval of Hazrat Khalifatul Masih on a yearly basis, on the recommendation of the Sadr-e-Majlis.