I have to support what joebloggs has said.

I personally would not mention about who will pay or how payment will be for airtickets.

Also just to mention that UKBA have not yet included any provision for 3rd party financial support in any visa application.

As it stands right now, the ECO can refuse any visa where finacials are weak or marginal despite any 3rd party financial support.
However, it appears that reconsiderations or formal appeals against a refusal would be successful based upon the declared 3rd party financial support. Obviously this is not a very satisfactory situation and I'm sure things will change soon.

Now, I'm not suggesting that anyone should immediately apply for a settlement visa based solely on 3rd party financial support and the probability that any subsequent appeal would succeed. Just highlighting the current state of affairs as reported by others.