Rehman is interviewed by the BBC on the Noor Khan case and the use of drone strikes in Pakistan and Afghanistan.
Video and article on the BBC website here.
Rehman Chishti MP: 'What I have found is a cloud of secrecy'
The High Court has blocked a legal challenge over claims that the UK government is unlawfully assisting US drone attacks by passing information to the Central Intelligence Agency.
Noor Khan, whose father was killed in a suspected CIA drone strike in northern Pakistan, had wanted a full judicial review.
But the court said it will not review whether GCHQ was sharing intelligence.
Government lawyers have said English courts could not rule on the case.
Conservative MP Rehman Chishti told the BBC he believes it is time the government explained its policy, rather than remaining silent.
Rehman Chishti has repeatedly asked questions about drones in Parliament - but has received no answers on the basis that intelligence matters are not discussed in public.
He said: "There is a cloud of secrecy in terms of the basic answers we want. What is the policy? What are the criteria? What are the circumstances? What are the rules in which drones are operated?"
"The inference I draw from the government not answering [these questions] is that the government is sharing intelligence with the United States because, if it wasn't, it could quite easily say."