Update: Cameron has broken his silence, with this statement
Forty-seven prisoners were killed by Saudi Arabia in a mass execution on Saturday morning.
The move has caused rising sectarian tensions across the Middle East and diplomatic ties have now been completely cut off between Iran and Saudi Arabia following the death of Shia cleric Nimr al-Nimr and ransacking of the Saudi embassy in Tehran.
After a meek statement from the Foreign and Commonwealth Office on Sunday, human rights charity Reprieve called on the government "seriously to reconsider" its ties with the kingdom and Amnesty said UK ministers should be "firmer in their condemnation".
The death penalty is abhorrent and our leaders and diplomats should say so at every opportunity, but this is a particularly shocking example.
- Independent on Sunday editorial
As a nation that outlawed the death penalty in 1969, and one that purports to stand for freedom and human rights...