What Bahrain accepts from Britain
People who set out to legalize documents for Bahrain often expect two stamps: one from a British desk and one from a mission. Bahrain does not work that way. It accepts a single-step certificate added in the United Kingdom, and that certificate is the whole of what a reader in Manama is looking for on the page.
So embassy attestation for Bahrain is not part of this route, and nothing is gained by adding it. There is no slot on the paper for a second stamp and no reader waiting to see one. Leaving that step out is not a shortcut around a rule; it is the route Bahrain itself has chosen to accept.
The Leicester side of the job
Only one British desk matters here. The FCDO Legalisation Office at PO Box 6255, Milton Keynes MK10 1XX adds the certificate, and it does so by post rather than over a counter. Nothing about that desk changes because your address is in Leicester, but where the paper starts does change.
For a civil record, Leicester Registration Service at 115 Charles Street is the place that can issue a fresh certified copy. A copy is the safer thing to put in the post, because a birth or marriage record lost in transit can only be replaced by ordering another one. Company and court papers follow the same idea: a certified copy travels, the original stays put.
Why people still look for the consular route
Searches for embassy legalization for Bahrain from Leicester come mostly from job files: a contract in Manama, a degree, a police record, a marriage record for a family visa. Gulf employers ask for well stamped paperwork, so people assume the longest route must be the right one. The file is the same either way; only the number of desks has changed.
Consular legalization for Bahrain is therefore the wrong thing to order, and paying for it adds cost without adding weight to the file. Document legalization for Bahrain ends at the British desk, and a paper that leaves that desk is done. Only a change made by Bahrain itself would put a mission back in the chain.