The formal signing ceremony transferring ownership of the 72 objects back to Nigeria unconditionally took place on Monday evening in front of Nigerian royalty and other dignitaries.London's British Museum has 900 items from Benin, and Prof Tijani added: "I think the British Museum is watching, I believe they are now taking it deeply to see that they do something, because every museum across the world is saying it is not right for them to hang on to these objects."He said seeing some of the objects in the British Museum would "give me high blood pressure", adding he would keep appealing to the museum to "really look at" returning artefacts, with the option to have objects on loan for display.Now it is viewed by many in the wider context of Britain's desire to break up a wealthy trading competitor and seize its assets.He said the individual plaques that make up the Benin bronzes were "like a page in a book" - telling the story of Benin - and the fact they have been scattered across the world was painful."