Spiritual leader Swami Ramdevji, aka Baba Ramdev, was allowed to remain in the UK last night after an eight hour detention at Heathrow that saw hundreds of followers come to the airport to support him.
He was allowed to remain with help from Home Affairs Committee chairman Keith Vaz MP, who also turned up at Heathrow to show his support and vowed to fully investigate the reasons for his detention. The guru will now stay until Tuesday when he was due to return home.
Mr Vaz said "It is still a matter of concern to his many supporters and thousands of people who couldn't be here today that he should have been treated in the way he was treated when he arrived at Heathrow.
"No Indian citizen with a valid visa entering the UK for lawful purposes should be held in this way.
"This is a very serious situation that occurred."
The Home Office said it refused to comment on individual cases.
Fears have been raised over two "incendiary" right-wing American speakers invited to an English Defence League march that will end where soldier Drummer Lee Rigby was murdered.
Chairman of the Home Affairs Select Committee Keith Vaz has written to the Home Secretary calling for Pamela Geller and Robert Spencer to be banned from entering the country. The far-right group is planning a march to mark Armed Forces Day on June 29, ending in Woolwich.
It has called on all its members to join for the last mile of the walk that afternoon, and Mr Spencer, who founded the website Jihad Watch, and Ms Geller, who leads the American Freedom Defence Initiative, are among three guest speakers.
The third is Anders Gravers, from Stop the Islamisation of Denmark.
Mr Vaz said: "I am alarmed that the EDL is planning this type of march in Woolwich. It is clear that the location, motivation and attendees at this march will incite hatred.
"Adding incendiary speakers such as Pamela Geller and Robert Spencer just fuels the fire. Before we have to pay the costs for the extra policing required for this demonstration the Home Secretary should consider using her discretion to ban these two speakers from entering the country."
"A ban should be enforced properly and physically stop people entering our borders."Scotland Yard said that it was aware of the march and would have an appropriate policing plan in place.
Last month British National Party leader Nick Griffin was stopped from attending a march in Woolwich on the grounds that it would inflame community tensions.
Instead members of the right wing party marched at Westminster, sparking clashes with rival anti-fascist protesters.
Keith Vaz MP, who represented the family of nurse Jacintha Saldanha, has written to the owners of Australian radio station 2Day FM to express his "concern" that Southern Cross Austereo "appears to have not taken any steps to assist the family."
Lengthy queues at Heathrow cleared overnight - but further concerns were raised today about the reputation of the airport with the Olympics on the horizon.
Keith Vaz, chairman of the Home Affairs Select Committee, told BBC Radio 4's Today programme: "There is a real problem and the problem has emerged over the last few months.
"I'm not saying we should abandon checks, but it's a choice for the Government - you either look at the way you deal with people when they arrive at Heathrow or you recruit more staff.
"This is not just about the Olympics, this is about what happens before and after, it's about Heathrow as a world-class airport and it's about our reputation, and we need to make sure we get it sorted."