The boss of under-pressure security group G4S will be back in the spotlight this week at the start of another busy few days for corporate results.

The fallout from G4S's bungled Olympics contract will dominate the agenda when the firm reports interim results today.

The company said it will lose up to £50 million on the £284m contract. The Government had to plug the gap with military personnel, and G4S chief executive Nick Buckles has been left fighting to save his career.

Analysts at Panmure Gordon predicted a possible hit to underlying earnings in the range of £2m to £4m.

Car insurer Admiral, which is the second-largest insurer in the UK with 2.9 million customers, is set to drive profits higher on Thursday.

Christopher Esson, an analyst at Credit Suisse, expects the group to report a 10% rise in pre-tax profits to £176m in the first half of 2012.

Global communications giant WPP also reports interims on Thursday.

Analysts are expecting half-year revenues to have grown by 3.8% across the group.