The niece of a Kenyan woman allegedly murdered by a former British army soldier is to visit the UK to meet the defence secretary and other MPs to push for the man's extradition.

Last month, a High Court in Kenya issued an arrest warrant for a British national accused of murdering Agnes Wanjiru, who had a five-month-old baby, in a market town in central Kenya, around 124 miles (200km) north of Nairobi, in 2012.

The 21-year-old's body was found in a septic tank at a hotel in Nanyuki, near a British army training camp. On the night she was killed, she had reportedly been at a bar with friends where British soldiers were also present.

Agnes's niece, Esther Njoki, told the BBC she was visiting the UK to seek "the justice our family has been denied for 13 years".

Speaking before her arrival in the UK on Sunday, Ms Njoki, 21, a communications student from Nairobi, said: "The UK has been too slow in acting.