It was not until 1670 that the pace of rebuilding started accelerating. A second rebuilding act was passed that year, raising the tax on coal and thus providing a source of funds for rebuilding of churches destroyed within the City of London. Wren presented his initial "First Model" for St Paul's. This plan was accepted, and demolition of the old cathedral began. By 1672, however, this design seemed too modest, and Wren met his critics by producing a design of spectacular grandeur. This modified design, called "Great Model", was accepted by the King and the construction started in November 1673. However, this design failed to satisfy the chapter and clerical opinion generally; moreover, it had an economic drawback. Wren was confined to a "cathedral form" desired by the clergy. In 1674 he produced the rather meagre Classical-Gothic compromise known as the Warrant Design. However, this design, called so from the royal warrant of 14 May 1675 attached to the drawings, is not the design upon which work had begun a few weeks before.