[transport] 'the knowledge' under attack

Satellite navigation systems may be the latest "must have" car gadgets but London cabbies, who have to pass the world's toughest taxi exam, are not impressed.

While hundreds of thousands of the electronic mapping devices are sold every year - despite some reports of software glitches that have sent drivers down one-way streets or up impassable mountain tracks - most cabbies in London regard them as ... read more and comment here.