The proscription of KAU, in 1953, left Africans without a political channel through which they could express their views.
It was not until 1955, when Africans were allowed to form political parties although at a district level.
Even though it was claimed that the district based political were to offer Africans a platform to have their voices heard, it was actually a scheme by the Government to pursue its policy of divide and rule, by perpetuating tribalism among Africans.
The first political party to be formed was Argwing Kodhek's Kenya African National Congress (KANC)in December 1955. However the KANC was outlawed barely three days after its formation; before it could even be registered.
Reason? Because its name had 'Kenya' in it and also because of the large number of Kikuyus who were enlisting as members.
The authorities feared the possibility of the KANC blossoming into a strong nation wide movement, which was going to be difficult to control.
On Dec 24, 1955 Kodhek issued a statement condemning the ban, in which he also contended that Kikuyus should be allowed political rights and that he was determined in his efforts to establish a political party for all Africans living in Nairobi, a matter he was going to raise with the Colonial Secretary in London.
The KANC was finally registered in May 1956 after it dropped 'Kenya' from its name and became Nairobi African District Congress (NADC) with Argwings-Kodhek as its president.
In its first policy statement issued on 12th May 1956 ,Argwings-Kodhek, demanded parity in the number of Africans in the LegCo, machinery to air African grievances openly to avert underground political activities, and better conditions for growing urban African community.
In the run-up to the 1957 elections there was a major split in the NADC instigated by trade unionists allied to Tom Mboya.
Mboya himself saw the split as an opportunity to hijack the NADC from Kodhek and use it as his political vehicle in the March 1957 elections, after the two failed to agree on who between them was going to be the candidate for the Nairobi LegCo seat.
When the plan failed to work, Mboya decided to contest as a workers' candidate while Kodhek contested using his NADC.
After March 1957 elections, Mboya tried to reach an agreement with Kodhek but was rebuffed, so he then attempted to infiltrate Kodhek's NADC, with his supporters led by Arthur Ochwada in order to stage another coup.
Following the reappointment of Kodhek and his followers to the leadership of NADC on 14th April 1957, Mboya realized it was impossible to take over the party, and gave up.
On 28th April 1957, a private meeting was convened by Arthur Ochwada , during which it was agreed that a new political party should be formed. The meeting was attended by trade unionists and members of the splinter group of the NADC.
While Mboya rarely took part in the deliberations, there were strong indications that he was the dominant figure directing the activities of the ostensible organisers.
The inaugural meeting of the new party which was named ,the Nairobi People's Convention Party, was held on 12th May 1957 in the Desai Memorial Hall.
The office bearers of the new party who were unveiled by Arthur Ochwada at the meeting were: Mark Kaigwa as Chairman, Patrick Rogai Vice-Chairman, Moody Awori Secretary, William Githinji Vice Secretary, George Nthenge Treasurer, Alfred Akech Mingusa Vice-Treasurer, John Abuoga Propaganda Officer.Mboya officially joined the NPCP in March 1958, becoming its president.