On the second line, Tullow Oil took on 5 pence at 552 after...

On the second line, Tullow Oil took on 5 pence at 552 after Credit Suisse upgraded its stance to 'outperform' from 'neutral' and raised its target price to 615 pence from 528 pence after yesterday's results from the mid cap explorer.

Credit Suisse said Tullow Oil's weak earnings during the first half were eclipsed by an upbeat conference call highlighting the company's exploration success year to date and upcoming appraisal activity set to further de-risk reserve upside