Rehman has sent a letter to the Prime Minister asking him to officially adopt the term Daesh when referring to the terrorist organisation to "deprive it of the legitimacy it seeks."
He wants the Government to include the change of terminology in its comprehensive strategy to defeat the terrorist group, often referred as the so called "Islamic State", ISIS or ISIL.
Rehman has been running a campaign to rename the group, which is now being supported by 170 MPs from across the political spectrum.
In his letter to the Prime Minister, Rehman writes that "an important part of your strategy should be to counter Daesh’s poisonous and abhorrent ideology and propaganda, which is sucking in vulnerable individuals."
He goes on to say: "It is appropriate for the Government to set the agenda and take the lead on this issue. The French Government has done so by officially using the term Daesh, and we have seen that the media and others have followed."
The full letter is below