Robins is both effusive and sly as Alice tries to keep one step ahead of her treacherous, bullying spouse.

WSJ: Review: 'Dance of Death' edgy as always

Ms Reddrop said Tabak had also used the internet to conduct "in-depth research" on the case in a bid to "keep one step ahead of the investigation".

BBC: Vincent Tabak found guilty of Jo Yeates murder

"One advantage it has over other services is that it can change quickly if hashtags become a polluted medium and it might keep one step ahead of the spammers, " he said.

BBC: Twitter followers 'can be bought'

The science and technology strategy is, according to Lord West, designed to help keep "one step ahead of the terrorists".

BBC: Anti-terror gun stops boats dead

These were good years, during which Dell became the world's largest and most profitable computer-maker, with a supply chain that was easily the most efficient in the industry, if not the world, and a direct-sales model that seemed to keep Dell one step ahead of rival companies selling computers through old-fashioned stores.

ECONOMIST: Michael Dell returns to the helm of the company he founded

General Motors is doing its part to keep its factories humming and stay one step ahead of the competition in the hotly contested full-size pickup segment by offering hefty cash incentives on its broad line of Silverado and Sierra models.

FORBES: Top 10 New-Car Deals For June