BOWLEVEN plans to ramp up its exploration activity in Africa over the coming year following a $250m (£160m) stake sale in Cameroon although the oil and gas firm is still awaiting presidential approval for the deal.

Edinburgh-based Bowleven said it expects to drill four wells in Cameroon, which chief executive Kevin Hart described as potentially significant.

It has not drilled any in 2014 so far.

Announcing annual results, the company said drilling of the first of two exploration wells on its Bomono permit onshore Cameroon is expected to start around the end of the year.

Bowleven expects to participate in two appraisal wells on the Etinde block offshore, which it believes could result in further discoveries in the area.

The costs of the Etinde wells will be carried by Lukoil of Russia and ­Cameroon's New Age under the farm-out deal agreed in June.

The companies will acquire a total of 50 per cent of Etinde in the $250m deal, leaving Bowleven with 25 per cent.

Bowleven expects to use proceeds of the deal to increase activity in Cameroon and elsewhere.

The company hopes to bring Etinde into production with Lukoil and New Age. It did not give an expected start-up date in its results statement.

In the first half of 2015 Bowleven plans to complete seismic surveys on acreage it acquired recently in Kenya. The company has been awarded blocks in Zambia.

The plans reflect a big improvement in the outlook for Bowleven.

Last November the company noted uncertainties at that time about its ability to continue as a going concern following delays in reaching a decision on whether to sanction the investment required to bring Etinde on stream.

Yesterday, Mr Hart said Bowleven will have a strong balance sheet following completion of the Etinde farm-out.

While the Cameroon government has approved the deal, Bowleven can not complete the farm out without an official decree from Cameroon's President Biya. It recently extended the long stop deadline for completion of the farm-out a second time, to December 31 from October 31 while it awaited the decree.

Regarding President Biya's sign off, Mr Hart said yesterday: "It very much is a when as opposed to an if."

The company had $14m cash at October 31 and a $30m undrawn credit facility. It lost $13.6m in the year to June and $11.1m in the preceding year. Shares in the Aim-listed company closed down 0.75p at 31.75p, giving it a market capitalisation of about £103m.