Shares in G4S were down on the FTSE 100 in afternoon trading ahead of the security company's full year results, expected tomorrow.

In November the group said that revenue for the first nine months of the year were up 5.6 per cent, thanks mainly to growth in its business in emerging markets.

The group is expected to report similar trends tomorrow but may take a hit from government spending cuts reducing its contracts with the public sector.

Keith Bowman, analyst at Hargreaves Lansdown, said ahead of the results, "On a consensus forecast basis, revenues are expected to rise by five per cent to £7.36 billion. Pre tax profit is forecast to grow by 13.3 per cent to £411 million. Ahead of the announcement, market consensus opinion currently denotes a buy."

By 17:00 shares in G4S were down 1.91 per cent on the FTSE 100 to 256.90 pence per share.