The quick answer for Coventry
Botswana accepts a simpler route for British official papers than full embassy legalization for Botswana from Coventry. You still need to prove your document's authenticity to the office there, but you do not go through an embassy. This applies to birth, marriage, or death certificates from Coventry Register Office and other official British records. The office in Botswana simply wants proof that the stamp on your paper is real.
For birth, marriage, or death certificates
If you have a civil record from Coventry Register Office at Cheylesmore Manor House, the route to take is clear. The Legalisation Office in Milton Keynes can stamp it with a special certificate. This step helps with document legalization for Botswana because it tells the receiving side that the signature is valid. Order a fresh certified copy from the Coventry office so you never need to send your only original away. The office provides copies for a small fee.
What Botswana expects to see
The office in Botswana requires no paperwork beyond this single certification. You will not need consular legalization for Botswana at their embassy. The complete file for legalize documents for Botswana includes just two things: your original British document and the certification that proves its stamp is real. Any office in Botswana should accept this without question.
How to prepare your Coventry papers
Start by checking whether your paper already has the right stamp. If not, the next step is to get that from the Legalisation Office at PO Box 6255, Milton Keynes. They handle the embassy legalization for Botswana by issuing a certificate, not by sending anything to an embassy. The process takes about a week normally, or 7–10 business days if you pay more.
About language and format
If the office in Botswana asks for a translation, it must be done by someone properly qualified. The translator will stamp their work and sign it officially. For embassy attestation for Botswana to be complete, keep the certified translation stapled to the original paper. This combined pack is what you present at the final step.