Capita, the firm that runs London's congestion charge, is set to return to the FTSE 100 index of leading UK shares
Capita has overcome its congestion charge problems
The group is expected to replace aerospace and automotive group GKN in the latest quarterly reshuffle.
The make up of the FTSE 100 is assessed every three months based on the latest market capitalisation values.
The latest reshuffle will be based on Tuesday's closing prices and formalised by the FTSE committee on Wednesday. The changes will take effect on June 21.
Capita first joined the FTSE 100 in March 2000, but dropped out of the index in June last year.
It ran into trouble after it took on the running of the capital's congestion charge and has also had some problems with its contract to run the Home Office's Criminal Record Bureau.
The company now says those difficulties are behind it.
It has recently picked up a number of contracts including ones with Dixons and children's savings group The Children's Mutual.