In 1646 the Scots captured King Charles I and opened negotiations with Parliament. It demanded the Newcastle propositions that included accepting the covenant, installing a Presbyterian form of church government, giving Parliament control of the Army for 20 years, and turn over key supporters for punishment. Charles refused to accept these stiff terms.
Main propositions
The main propositions were:
Royalists had to wait five years before running for or holding an office.
The Book of Common Prayer was allowed to be read but not mandatory, and no penalties should be made for not going to church, or attending other acts of worship.
The sitting Parliament was to set a date for its own termination. Thereafter, biennial Parliaments were to be called, which would sit for a minimum of 120 days and maximum of 240 days. Constituencies were to be reorganized.
Episcopacy would be retained in church government, but the power of the bishops would be substantially reduced.
Parliament was to control the appointment of state officials and officers in the army and navy for 10 years.
King Charles' reaction
Even after the occupation of London by the New Model Army had taken place, Parliament, instead of taking up the Heads of the Proposals as the basis of a settlement of the kingdom, sent to the King a revised edition of the Newcastle Propositions, differing mainly in that it proposed a limited toleration for dissentient Puritans, whilst forbidding all use of the book of Common Prayer. In his reply to their propositions, the King, on 14 September, expressed a preference for the Proposals of the Army, as more conducive "to the satisfaction of all interests and a fitter foundation for a lasting peace". Major Huntington's letter shows that the King expected the leaders of the Army to stand by him in procuring an offer of better terms from parliament. The question of a new treaty was discussed in the House of Commons on 22 and 23 September 1647. Henry Marten and his party were eager for the passing of a vote to make no further addresses to the King. Cromwell and Ireton, on the other hand, opposed Marten's motion, and the House finally resolved on 23 September that they would once again make application to the King. This decision led to much discontent amongst the Levelling party in the Army as also outside of it, and "the credit and reputation" of both Cromwell and Ireton was much blasted thereby. They were accused of falsely representing it to be the desire and sense of the Army that this new application should be made to the King. The charge is thus stated by Wildman in his Putney Projects. Because Oliver Cromwell and Henry Ireton negotiated with the King, they lost the army radicals' support. The radicals criticized their "servility" to the king. Without an amicable solution between the Army, King, English Parliament, and the Scots the Second English Civil War started.