Writing in Thorax, the journal of the British Thoracic Society (BTS), the researchers said doctors in London should be particularly aware of the risk that patients with either TB or HIV may also have the other condition.

BBC: HIV tests for TB patients call

Researchers from Warwick University, writing in the British Journal of Psychology, said that dogs gave people a safe topic of conversation with which to break the ice with a stranger.

BBC: Dogs help you make friends

Researchers addressing the British Association's science festival in Leicester last month said a new directive from Brussels could lead to radical changes in the way agricultural land was managed across Europe, with some types of farming being scaled back or even abandoned in some of their traditional areas.

BBC: English and Welsh rivers 'improving'