Global markets were back on the front foot yesterday as investors took heart from reassuring comments by the next boss of the US Federal Reserve and recovered some of the heavy losses of the previous session.

Janet Yellen, who takes over from Ben Bernanke at the end of January, said the Fed had "more work to do" to help the US economy, easing market jitters about the tapering of asset purchases.

The FTSE 100 Index climbed 36.1 points to 6666.1 while stock markets in Germany and France surged ahead by more than 1%.

London's top-flight dropped by nearly 100 points on Wednesday on fears about US tapering as well as worries about the future of monetary stimulus in the UK following the Bank of England's quarterly inflation report.

The Bank said a key unemployment threshold, used to determine when interest rate rises might be considered, would be reached sooner than had been expected.

Anxiety about the removal of stimulus, particularly the Fed's multi-billion dollar monthly quantitative easing programme, has weighed on stocks from time to time in recent months so Ms Yellen's remarks came as a relief.

The comments, taken from the prepared text of evidence to the Senate Banking Committee ahead of her appearance, saw New York's Dow Jones Industrial Average rise overnight.

As the remainder of her live testimony before US legislators unfolded, it did little to dampen the mood and the Wall Street index was modestly ahead again during the latest session by the time of the close in the UK.

On currency markets, the pound was flat against the greenback at $1.61 and against the euro at €1.19.

In London, the majority of blue-chip stocks were in positive territory, although Centrica slid 5% after it warned it would fail to meet the City's expectations for annual profits.

The firm said overall group earnings, which had been expected to rise by 3% to 4%, were now likely to remain flat on the £2.7 billion reported in 2012 after being affected by challenging conditions in its business supply arm across the UK and US. Shares fell 18.6p to 345.3p.

On the risers board, supermarket Sainsbury's enjoyed a second day of gains in the wake of its well-received 7% rise in half-year profits, as a clutch of broker upgrades lifted the stock higher still.

Shares rose another 3.9p to 414.6p, despite a £1bn price-cutting strategy unveiled by US-owned rival Asda which saw other grocers lose ground.

Tesco slipped 8.6p to 356.2p while Morrisons also fell, off 7.8p at 266.2p.

The biggest FTSE 100 risers were Aberdeen Asset Management, up 12.3p to 419.2p, Shire up 79p to 2840p, WPP up 35p to 1342p and ITV up 4.6p to 186.4p.

The biggest FTSE 100 fallers were Centrica, Morrisons, Tesco and Rexam down 12p to 506.5p.