Some sources for a history of English Socinianism a bibliography of 17th century English Socinian writings

Conclusion

In 1697, the Presbyterian, William Bates, presented an address, on behalf of some dissenting ministers, to William of Orange. In this, he called for measures against the Socinians and Deists, and, in particular, for the banning of the publication of Socinian works. Bates' address was published in JOHN HOWE, Sermon Preech'd on the Day of Thanksgiving (1698). On 17th February, 1698, the House of Commons presented an address to the King, We do further, in all humility, beseech Your Majesty, that Your Majesty would give such effectual order, as to Your Royal Wisdom shall seem fit, for the suppressing all pernicious books and pamphlets, which contain in them impious doctrines against the Holy Trinity, and other fundamental articles of our Faith, tending to the subversion of the Christian Religion; and that the authors and publishers thereof may be discounted and punished.

The statute 9 and 19 William III, c. 32, An Act for the more effectual suppressing of Blasphemy and Profaneness, accepted these requests. It prohibited the writing, publishing and teaching of doctrines that were contrary to the Trinity, Christian truth or the divine authority of the Old and the New Testaments.

It should be noted that the Toleration Act of 1689 does not extend tolerance to, amongst others, those who deny the dogma of the Trinity. It was not until 1813 that the Unitarians were free to practise their cult. The Trinity Act (An Act to relieve persons who impugn the Doctrine of the Holy Trinity from certain Penalties. 53 Geo. III, c. 160) of that year exempted the Unitarians from the penalties laid down by the Toleration Act and by the Blasphemy Act quoted above