It comes after the murder of a Christian couple in the country earlier this month.
26-year-old Shahzad Masih and his 24-year-old wife Shama Bibi who, was four months pregnant, were beaten, tortured and burned alive in a furnace.
They were attacked by a mob of Muslims after a claim they had ripped up a Koran was shouted from mosque loud speakers.
Protesters were addressed by Rubab Mehdi Rizvi a Muslim Barrister and former Spokesperson for the Ministry for Human rights in Pakistan.
The event was organised by the British Pakistani Christian Association and supported by the Evangelical Alliance.
Wilson Chowdhry from the BPCA led the protest and told Premier the UK government should stop sending aid to Pakistan.
He said: "These funds should now be taken away or removed if Pakistan refuses to change its human rights record.
"I can't believe people in this country want to see money going to a nation that treats people in such an awful manor."