LONDON (Reuters) - Africa-focused oil explorer Tullow Oil (>> Tullow Oil plc) said on Friday that a London court ruled in its favour in a case brought against Heritage Oil (>> Heritage Oil PLC) over Ugandan tax.

The case was centred on over $400 million (255 million pounds) worth of capital gains tax demands made by the Ugandan government after Tullow's former partner, Heritage Oil (>> Heritage Oil PLC), sold assets in the East African country to Tullow in a $1.45 billion deal in 2010.

Heritage said in a separate statement that it would evaluate its legal options with a view to appealing the judgement. It has 21 days to do so.

"Mr. Justice Burton found in favour of Tullow's indemnity claim for US$313 million in its entirety and also dismissed Heritage's counterclaim," Tullow said in a statement.

(Reporting by Sarah Young, Editing by Rosalba O'Brien)

Stocks treated in this article : Heritage Oil PLC, Tullow Oil plc