Should Charlotte Church be treated at Chequers?

Well done to Norman Lamb for eliciting the information that Tony Blair's guests at Chequers, in his last few months as PM, included:

-Charlotte Church
-Gavin Henson
-Lorraine Kelly
-Richard Madeley
-Chris Evans
-Vernon Kaye

It speaks volumes about this government's lack of commitment to freedom of information that it took months of effort to extract this information, as Norman comments:

For reasons that defy rational explanation the government has been treating the fact that Tony Blair enjoyed drinks with Vernon Kay and Charlotte Church as a state secret.

Could the government's reluctance to publish this information be motivated by an attempt to avoid this question?:

Why is Charlotte Church being treated to a slap-up meal at Chequers at the taxpayers expense?

What possible advantage to the country can be gained by discourse between a departing Prime Minister, a singer and her Rugby playing partner? Even if such interaction were justified, does it have to be accompanied by luxury treatment at the taxpayers' expense?

And we hear today that Blair's farewell tour cost the taxpayer £1.7 million. Surely some of this should billed out to Blair's future publisher and agent? After all, much of it was an advance publicity tour for Blair's future lecture tours and publications.