President Paul Kagame, on Tuesday, September 6, congratulated Liz Truss on becoming the new Prime Minister of the United Kingdom, replacing Boris Johnson.

Truss was on Tuesday formally appointed by Queen Elizabeth II, a day after she was named the new Tory leader, beating Rishi Sunak with 57.4 per cent to 42.6 per cent.

The former foreign minister won the leadership race for the governing Conservation Party with 81,326 votes to Sunak's 60,399.

"Congratulations Liz Truss on your election as Prime Minister of the UK. We look forward to further strengthening the existing close ties between the UK and Rwanda and wish you success," Kagame tweeted.

Truss, 47, succeeds Johnson who submitted his resignation to the Queen earlier Tuesday.

She was until her election the Secretary of State for Foreign, Commonwealth and Development Affairs.

Among her priorities, Truss said she will address the issue of energy crisis and take measures to curb increasing cost of living such as tax cuts.

She has previously said she will push for the UK-Rwanda migration deal that will see Rwanda host migrants who have entered the UK illegally.

Announcing the deal earlier this year, the two nations said they were taking bold steps to help address the imbalance in global opportunities which drives illegal migration while dismantling the incentive structures which empower criminal gangs and endanger innocent lives.