‘Collective Cabinet responsibility is, as your Lordships well know, crucial to our system of government in Parliament. Without it, day-to-day executive decision making would simply break down.’ (Lord...

‘Collective Cabinet responsibility is, as your Lordships well know, crucial to our system of government in Parliament. Without it, day-to-day executive decision making would simply break down.’ (Lord Kingsland, HL Deb, vol. 708, col. 134 (24 February 2009))

Would executive decision making ‘break down’ without collective Cabinet responsibility, or does the supposed importance of this convention disguise the weakness of the Cabinet within the UK Constitution?