Theresa May's decision shows a glaring disregard for human rights and also a dangerous message of approval to the leaders of GCC regimes who continue to perpetrate human rights abuses against their own and other citizens.
In Bahrain the al-Khalifa regime continues to ignore the conclusions of an international commission of inquiry set up in 2011 to investigate the Arab Spring uprisings of that year in which Shia mosques and holy places were razed, doctors and opposition leaders arrested and tortured and tens of protestors killed.
None of the Inquiry's main recommendations which include judicial and legislative reforms ensuring fair trials, an end to torture, and criminal accountability for rights violators have been implemented.
To the contrary is business as usual for the regime. Arbitrary detentions of human rights and opposition leaders are continuing with many being regularly arrested for speaking out against the government and tortured in custody.
The PM's trip will also furnish another serial regional violator of human rights, Saudi Arabia with legitimacy for its ongoing war in Yemen. In its determination to see a puppet-regime across the border a Saudi-led coalition continues to commit atrocities against Yemeni civilians.
It has hit hospitals and schools, destroyed bridges, power stations, poultry farms, a key seaport and factories that produce yogurt, tea, tissues, ceramics, soft drinks and potato chips. It has bombed weddings and a funeral - last October coalition warplanes targeted a funeral gathering for a Houthi leader in Sanaa killing 140 people and injuring 550 more.
The letter states: "It is indeed an outrage that despite these widely documented atrocities committed by Bahrain and Saudi Arabia, you, your ministers and your government continue to supply both regime with arms helping them wreak human rights abuses, death and destruction, and war crimes on a systematic basis."
SH/IHRC