UK citizens are granted a visa-free stay of up to 3 months in Namibia for tourism and business purposes, however this is changeable and it's important you check the entry stamp applied in your passport upon entry.
Your passport should be valid for at least 6 months from the date of entry into Namibia.
You are able to travel to Namibia without a visa if your purpose is one of the following reasons:
Attending workshops (not as a facilitator),
Attending meetings or conferences,
Exploring business opportunities.
However, if you wish to travel for one of the following reasons, then you are required to obtain a business visa before arrival:
To give training to local staff,
to conduct audits of your companies,
The High Commission only accepts applications on Monday-Thursday between 09:00am and 12:00pm. Please bare this in mind when considering how quickly you need the visa.