When the king tried to arrest five leaders of the parliament (Pym, Hampden, Haselrig, Holles, Strode and Montagu) he was frustrated by popular demonstratives. However, they had been warned beforehand and had already fled.
A majority of the House of Lords withdraw from Westminster out of sympathy. There were popular demonstrations against Charles which compelled him to take his family to Hampden Court for safety.
Propositions included all privy councillors were to be approved by parliament, five impeached MPs were to be pardoned. Charles had to accept the Militia Ordinance and parliament would reform the church
The Solemn League and Covenant, a military alliance formed in 1643 between the English parliament and covenanters alienated some of the Scottish nobles to the point where some come to the support of Charles.
One Scottish noble, the earl of Montrose, led royalist forces to the north of the border against covenanters. His army won victories between 1644-45. The little support from Charles for these victories saw the forces leave the army to return to their homeland.