I'm wondering if one of the legal brains here could confirm that my understanding of the law is correct in the following scenario which I encountered earlier this week...?

I was due to travel from the UK Mainland to the Channel Islands on Monday afternoon, with an airline based in the Channel Islands (one of the two... it doesn't matter which!)

When I checked in I was informed that there was fog in the Channel Islands, that my flight was delayed indefinitely, and that there was a possibility that it might be cancelled.

The cancellation was confirmed about 90 minutes later, and I was rebooked on a flight the following morning. I was told that the airline was not liable for the cost of my overnight stay.

The next morning it was my departure airport that was fog-bound, with clearer weather forecast for the latter part of the morning. I was informed of an estimated two-hour delay at check-in, which turned into nearly four hours in the end. It was only later, when other airlines put out announcements about refreshment vouchers, that it occurred to me that I should perhaps have been offered one too...

On re-reading the EU rules I believe that the legal position is as follows:

1) EU rules apply - as I was departing from an airport within the EU (but they would not have applied if I had been delayed on departure from the Channel Islands)

2) The airline was correct in not paying me anything for the cancelled flight as the cancellation was due to circumstances outside their control.

3) The airline should have offered me a refreshment voucher as the "circumstances outside their control" clause does not apply to delays.

Is this correct, or am I missing something?

Any insights from the resident legal eagles would be much appreciated!