Doughty Hanson, the independent European private equity company, is set to make a profit of £390m (€637m) on the sale of Dunlop Standard Aerospace Group to Charterhouse Development Capital in the next few weeks, according to sources close to the talks.

The two private equity companies are close to signing a deal under which Charterhouse will acquire Dunlop Standard for approximately £900m, the sources said. Doughty Hanson and Charterhouse have been in talks over the sale of Dunlop Standard for the last few months.