The FTSE 100 fell 8.40 points, or 0.1%, to 6,081 points today, led by a slump by mining companies at the end of the session.
Contributions to the final salary pension funds of the top 100 companies increased last year by an average of 30%, according to research by consultants Watson Wyatt.
The FTSE 100 Index gained 28.60 points, or 0.48%, to 6,029.40 points today led by PartyGaming.
The FTSE 100 Index has increased 15.50 points, or 0.3%, to 6016.30 points this morning led by HBOS and Rolls-Royce.
The FTSE 100 has closed down 15.7 points at 6,000.80, as mining stocks declined amid speculation this year's gains for Europe's best-performing industry have overstated the potential for profit growth.
An early morning ‘hair of the dog' has kept the FTSE 100 index flat against a run of stocks in the mining sector heading downwards this morning.
The FTSE 100 index fell 0.83% to 6,016.5 points today as mining and oil stocks saw early gains trimmed and Scottish & Newcastle dominated the fallers.
The FTSE 100 Index has gained 16.70 points, or 0.3%, to 6021.40 points this morning led by Anglo American and BP.
The FTSE 100 Index fell 0.33% to 6,004.70 points today, led by losses among oil heavyweights, Tate & Lyle and GlaxoSmithKline.
The FTSE 100 Index has slipped 3.8 points, or 0.1%, to 5931.9 points this morning led by Kazakhmys and Tate & Lyle.