Found this mention of the trip in Fugitive Offender, memoir by Chief Anthony Enahoro.

"However, the leaders of the N.C.N.C. went on to complete their tour, in the course of which they raised £13,000 for the delegation to London, where the Secretary of State for the Colonies told them quite briefly to 'go home and co-operate' with the administration."

#NigeriaHistory #Enahoro