"Quit smoking" is not something pop star Charlotte Church - seen here promoting No Smoking Day - would have said in the past...

...But the reformed smoker is determined to keep her two-month old cigarette-free lifestyle going.

A Boots employee shows Church a kit which tests the levels of carbon monoxide in the blood.

The singer gamely has a go to see the effect quitting has had on her levels...

...And is clearly happy to find stopping smoking puts her in the healthy "green" zone.

Tina, Church's birthday present from boyfriend Gavin Henson, shows no interest in her mistress's efforts for the nation's health.