This was followed be a series of articles which appeared in the Inquirer in 1943 and 1944. The idea of a Unitarian Fellowship was not entirely new; an organisation was set up by the Central Postal Mission at Essex Hall in about 1920 to keep in contact with isolated Unitarians but this soon disappeared. Those who were interested were asked to write in to J K Montgomery, who can be said to be the midwife of the NUF. A selection of the letters received were published in a follow up article in the issue of 13 May 1944. Much of the article was taken up be a letter from Rev. Francis Terry, who from the very start became a major influence on the NUF and remained so for most of its first forty years.
He argued that the proposed NUF should be a catholic body to include “not only Unitarians, but also liberal-minded members of other churches, Liberal Jews, and Julian Huxleyites, as well as unattached individuals”. This idea was strongly opposed by Montgomery and others who believed that membership of the new body should be wholly Unitarian, but the idea of Rev. Arnold Thomas that a postal mission should be included, emphasising the devotional aspect and the spread of Unitarianism, was warmly endorsed. Further support was requested, and the replies were sufficiently encouraging to justify forming the Fellowship. In August 1944 a provisional committee was set up at the instigation of Belton and Montgomery. The Preamble and Rules were then created by correspondence.
In March 1945 Leslie Belton, who became the first President, announced the setting up of the NUF, which he pointed out was taking place at the same time as the creation by the American Unitarian Association of the Church of the Larger Fellowship. He wrote to all ministers of Unitarian congregations asking for support and particularly the names of isolated members. Those who wished to be founder members were asked to write to Montgomery while C Winifred Dyer agreed to act as the first treasurer. She was succeeded by Maurice Limb in October 1945.
During the General Assembly meetings in London in May 1945, a public meeting was held at which the aims and objects of the NUF were explained, and it was clear that the new body had attracted the interest of many Unitarians. The provisional committee met the following day, which agreed that a full committee of twelve should be elected after 30 June, with a newsletter to be published as soon as possible with Rev. Arnold Thomas as editor. The subscription was fixed at the rather high figure of 10/- (50p) per annum. The new Rules were sent to members, which were confirmed, and it was agreed that the NUF should formally come into being at the end of 1945. However before the end of the year the first number of the newsletter had appeared in the July and the second in September. By the start of 1946 between eighty and a hundred members had joined. The NUF was seen by many Unitarians as one of their most positive initiatives to spread their faith in a nation newly at peace.