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The grounding of planes has been like an unscheduled experiment. What has been the impact on the environment? On health?

We'll answer more of your questions about the travel distruption - what's happening to people not able to get back from long haul destinations, to tourists in the UK wanting to get home and mail deliveries.

We're also finding out how registering to vote can improve your credit rating. Have water companies been given licence to pollute?

Plus, while the Health & Safety Executive insists that offices and other work places have first aiders - and certify people as work place first aiders - there's no official certification for any other kind of first aid. This lack of regulation means anybody can set themselves up as a first aid trainer. We discuss calls to better regulate first aid courses.

We look at a conference of international energy ministers about setting up a group - like OPEC - for liquefied gas producers. If Russia, the main pushers of such a consortium, get their way, we could see a massive hike in our gas bills.