I do not agree with all the long breaks we have from Parliament. The changes to the situation in LIbya and the new data about the Uk economy would be useful items to discuss, to ask the government for its latest thoughts.
I do not agree, however, that Parliament needs to meet to have a new vote on the Libyan situation. The government presumably knows that it has to keep to the terms of the UN Resolution which in turn were the terms of the UK Parliamentary motion. They may wish to get rid of the dictator, but the UN has not charged them with that duty and they would not be entitled to endanger civilian lives to do so.
If the leading western powers now wish to change their mission from protecting civilians to siding with the rebels and ousting the Head of state, they need first to return to the UN. If they wish to arm the rebels so they can fight more effectively, they will need UN permission to lift part of the arms ban on Libya. If they wish to make regime change the purpose, they need to amend the resolution.
The reason many other NATO countries will not supply air to ground attack aircraft is they are worried about the legality and dangers of using such weapons. Successful destruction of Libyan government tanks in open ground en route to shell civilians is within the spirit of the Resolution. Armed intervention against one side within urban areas where civilians may get killed does not appear to be within the terms of the Resolution.
If France and the Uk want to make regime change rather than the defence of civlians from the more grotesque attacks the purpose, they do need UN sanction. Then the Uk Parliament should meet again to debate and vote on the change mission.
I hear debate about the dangers of stalemate on the ground between government and rebel forces. That is a Libyan matter which is not covered by the UN. NATO governments have permission to run a No fly zone. They have established one, and have prevented the Libyan regime bombing its own civilians. All the time that remains the aim Parliament can be a no talk zone. Any mission creep requires UN and Parliamentary approval.