Although it is already being used by the trust in other parts of the south west area, it has been delayed in Devon and Cornwall and will not now be introduced until May and June respectively.

BBC: South Western Ambulance

Although these are already banned or being phased out, they are thought to be commonly used in Africa.

BBC: Ghana bans second-hand fridges

Although Chinese officials define the population as being already nearly 50% urban, the number of urban hukou holders is only around 35%.

ECONOMIST: Urbanisation

Although the first such images were published only last year, by research groups in America and Europe, attempts are already being made to commercialise the technique.

ECONOMIST: Medical imaging