The Houses of Parliament were lit up in red yesterday night.
The temporary colour scheme was implemented to mark Red Wednesday, which is a day where people who have suffered for their religion are remembered.
The campaign was organised by charity Aid to the Church in Need (ACN) and it paid tribute to those who were killed, kidnapped and tortured for their beliefs.
Patricia Hatton, who is CAN head fundraiser, launched the campaign last year.
‘Prayer is the cornerstone of the Red Wednesday campaign,’ she said.
‘In this country, faith is a bit of a dirty word and people are dismissive about faith groups, and yet society benefits so much from the charitable outreach of people of faith.
‘We are calling for respect and tolerance of people of faith but we are also asking for respect and tolerance between faith traditions. There should be mutual respect between faith groups.’
In Christianity red is the colour of martyrdom.
The event is also supported by the Christian Solidarity Worldwide (CSW), which added: ‘On 22 November, churches and public buildings across the UK and around the world will light up in red as a sign of solidarity with persecuted Christians.’
Religious buildings have also been lit up in red in the past, including Westminster Abbey.