It's probably worth citing the "normal procedure" for an opposition day debate. Essentially the government does a negativing amendment and wins the vote.
"In an exception to the normal rules of debate, the main motion (the opposition motion) is debated and voted on first, rather than any amendment. This is to allow a decision on the opposition motion to be taken first, before any amendment is put. Many opposition motions criticise Government policies and decisions and the Government often tables an amendment to remove most of the text, replacing it with text commending the Government instead. Government amendments are usually carried under majority Governments."
And: "The Government does not table an amendment to every motion, sometimes it simply votes against the motion. Not all motions are critical of the Government, in such cases opposition motions have been agreed without a vote. Amendments can be tabled by other opposition parties. The Speaker selects which amendment, if any, is taken."
The clerk of the house in saying the Speaker had gone against advice, told him:
a) Your decision is not specifically precluded by any Standing Order;
b) The Speaker and his Deputies have complete discretion regarding the order in which to call Members to speak;
c) The Speaker has discretion over which amendments to select;
d) There have been two occasions in the last 25 years or so when an amendment has been moved by an opposition party Member from a party other than the one to which the day had been allotted (as well as one when a government backbencher moved an amendment) and on one of those occasions, the Official Opposition Member was called to move his amendment before a minister was called — however, in those few circumstances, no Government amendment had been tabled; and
e) You have been motivated by giving the House what you considered to be the widest choice of decisions on alternative propositions, on a subject of immense importance, on which people in and outside the House have the strongest of views.
And there's still a million people on the edge of starvation.