SOME evidence relating to the sexuality of British businessman Shrien Dewani has been ruled inadmissible by a judge at his murder trial.

Western Cape High Court deputy Judge President Jeannette Traverso said some email communications between Dewani and an undisclosed man between June and August 2009 found on his dead wife Anni's laptop were "not relevant".

Prosecutor Adrian Mopp said the content of the emails showed Dewani - who is accused of plotting to murder his wife on their honeymoon - was "conflicted" about whether to get married or not, it was reported.

The prosecution argues that Dewani, 34, wanted out of the marriage and arranged a staged hijacking in November 2010 in which he escaped and Anni was killed.

Admissions previously released by the court disclosed that Dewani was logged in to gay sex and fetish websites within 48 hours of his wife's body being found.

Dewani, from Westbury-on-Trym near Bristol, denies five charges: murder, conspiracy to commit kidnapping, robbery with aggravating circumstances, kidnapping and defeating the ends of justice.

The judge, who asked the prosecutor why Dewani's sexuality was relevant, delivered her ruling after a short adjournment to gasps in the courtroom.

Mr Mopp said Dewani had provided the court with a version of events around his sexuality and he wished to explore those disclosures.

The trial continues.