The FTSE edged 0.4% higher to 5,574.98 points in early trading, recovering some of yesterday's 2.1% loss.
By 08.45 it was 24 points higher, although its rise was muted by ongoing concerns over Europe's debt problems.
M&A talk in the technology sector helped push Invensys and ARM Holdings higher, by 1.3% and 0.7% respectively.
Autonomy Corp, on the prowl for takeover targets, was also up, by 0.5% at £13.31.
Gold's marginal rise yesterday helped push African Barrick Gold 1.5% higher to 510.5p.
Among fallers, news British Airways cabin crew could strike early next year sent its shares down 0.3% to 260.4p.
Others losing ground included Resolution, off 0.7% to 218p, while Schroders dropped 0.8% to £16.17.
Among mid-caps, stellar full-year results from Aberdeen Asset Management pushed its shares up 1.1% to 180.1p.
In the US, the Dow Jones fell 0.4% to 11052.49 overnight and the S&P 500 also fell marginally as Europe's financial troubles weighed on sentiment.
The dollar briefly touched a two-month high versus the euro, whilst the single currency was up 0.3% against sterling in early trading.
Bank of America rose 1.7% to $11.31 after one analyst said it might hike dividends early next year.
Amazon.com closed up 0.9% at $179.49 after an upbeat report on seasonal spending.
In Asia Japan's Nikkei 225 fell 1.9% to 9937.04 points.
Data quality is key
Granted leave to appeal the judgement