Wikipedia
The Bhat, Bhatt, Bhatta, Bhatra, Bhatrai community, refers to a priest, bard, scribe in Sanskrit, a title given to learned Hindu Brahmins, Sikhs and Muslims with Saraswat Brahmin heritage. This community are also known as the Sangat community and are comprised majorly of Sikh, there is also a size able Muslim community ( Bhat clan). Today in the United Kingdom there are significant numbers of Sikhs with Bhat ancestry, as there are in India. The majority Bhat Sikhs originate from Punjab and were among the first followers of Guru Nanak. In the Punjab most Bhat Sikhs are now in Patiala, Amritsar, Nawashahar, Hoshiarpur, Gurdaspur or Bhathinda districts, or in Jalandhar or Chandigarh; they also dwell in other parts of India such as Delhi.
Bhat Brahmin priests were engaged in attaining the highest 'spiritual' knowledge (brahmavidya) of Brahman and adhered to different branches (shakhas) of the Vedas. The Brahmin priest was responsible for religious rituals in temples and homes of Hindus. They were authorised (after rigorous training in vedas and 'sacred' rituals) as liaisons between humans and God. In general, as family vocations and businesses are inherited, priesthood is also inherited among Brahmin priestly families. Brahmins are located at the top of the caste pyramid and were followed by the Khastriya (Kings, Warriors), Vaishyas (Merchants, Landlords), Shudras (Servants) and finally the untouchables (street cleaners, leather workers etc).
The arrival of Islamic invaders in the north of India saw a large scale upheaval for the Hindu Bhat Brahmin's, as many Hindu temples were destroyed leading to the unsettled lives for the fleeing Hindu Bhats. The birth of Sikhism in the north of India caused many Hindu Bhats and some other types of Hindus to embrace the teachings of Guru Nanak Dev Ji, becoming Sikh Bhats or Bhatras, etc. The Bhat Sikhs were devoted followers of the Sikh Gurus, where they used there hereditary skills as priests and scribes to recite poetry, write down events, take part in religious discussions and as missionaries. As religious intolerance continued the Bhat Sikh took part in many of the Gurus campaigns against persecution on and intolerance. The Bhats contributed 123 compositions in the Sri Guru Granth Sahib (pp.1389–1409), known as the "Bhata de Savaiyye". They also wrote the Bhat Vahis, which were scrolls or records on the Gurus and Sikhism maintained by the Bhat Sikhs.
In recent times the Bhat Sikhs went on to travel and establish Sikh temples, around the globe mainly in the UK, Canada and the USA. Todays Bhat Sikhs have varied professions.