Church of Christ pastor Hassan Abduelraheem Kodi and Czech aid worker Petr Jasek were handed substantial jail terms for spying in Sudan . A third man, Abdulmonem Abdumawla was also found guilty of espionage.
The group were arrested after they raised money to help a man injured in a protest.
State officials claim they are spies and a court sentenced the pastor and Abdumawla to twelve years behind bars whilst Jasek was given a 23 year stretch.
They were also given substantial fines.
The group will be appealing their sentences.
Lord Alton of Liverpool raised the issue again in Parliament yesterday. He asked the Government what representations they had made to Sudan about the matter.
In response, Baroness Anelay Of St Johns said that the Government was deeply concerned over the verdict of the case.
The Rt Hon Baroness Anelay of St Johns said the Government were monitoring the situation
She added that officials from the British Embassy in Khartoum were in court for the verdict and had been monitoring the situation since the group were arrested.
"We have regularly raised our concerns over this case directly with the government of Sudan, most recently on 22nd January; and we will continue to do so as part of our ongoing human rights dialogue," Baroness Anelay said.
"We call on all countries to comply with their international human rights obligations.
"We support the work of the UN Independent Expert on the situation of human rights in Sudan to assess efforts undertaken by the government to respond to recommendations made in this context."
Sudan is ranked 5th on Open Doors' World Watch List 2017 for Christian persecution.