As Theresa May takes over as Prime Minister of the United Kingdom, a new visa regulations have been written and this ruled out visa requirements for citizens of Commonwealth member countries.
As per this revision of the visa regulations, all citizens of Commonwealth nations of which Uganda, Nigeria is among no longer require visas when traveling to the UK for a period of six (6) months.
However, people wishing to stay for longer than six months are still required to obtain visas.
People traveling to take up courses longer than six months as well as those settling with their families are also required to obtain visas.

Business visitors are also eligible to travel without visas.