Where the route stops
Kyrgyzstan joined the Hague Convention in 2011, so an apostille for Kyrgyzstan is the correct and sufficient certificate and no consular desk adds anything after it. Document legalisation for Kyrgyzstan is complete when the sheet comes back from Milton Keynes with its certificate attached, which makes the finish line unusually easy to see.
That is worth stating plainly, because a one-stage route hands responsibility back to you sooner than a longer one does. From the moment the envelope arrives, nothing further is being done to the paper by anybody, and every risk left is a handling risk rather than a process risk.
The sheet is given away, not shown
Most people picture presenting a document and putting it back in a folder. In practice a certified paper is surrendered: the body that asked for it keeps it, and your copy of the record is now in someone else's file. An apostille issued in Coventry for use in Kyrgyzstan binds to one physical sheet, so what you hand over cannot be reconstructed from anything you kept.
That single fact drives the planning. If two bodies each want to hold a paper, two sheets must run the whole route, each with its own certified copy and its own fee. Deciding that at the register office counter costs one visit; discovering it afterwards costs the route again from the beginning.
Keeping a record of what you sent
Make a plain copy of the finished pair before it leaves, and file it with the date and the name of whoever received it. It carries no official weight at all, and that is fine — its job is to answer your own questions months later, when someone asks what was sent or whether a second sheet is needed.
The certificate you have always owned should never be part of any of this. Coventry Register Office, Cheylesmore Manor House, Manor House Drive, Coventry CV1 2ND, reissues civil entries as certified copies, so the irreplaceable paper stays at home while a replaceable one does the travelling. An apostille from United Kingdom to Kyrgyzstan works just as well on the copy.
Handling between the postbox and the handover
Keep the returned bundle intact and flat. Adding staples, clips or holes of your own, trimming an edge, or writing on either page changes a document that an office has certified, and no desk vouches for marks it did not make. Store it away from damp and heat, and resist the urge to tidy it up for presentation.
Allow time for both waits when you plan: the register office printing your copy, and the postal turnaround at the Legalisation Office. Each depends on how busy the office is, so treat any date you have been given as a target rather than a promise, and leave room between the return and the handover.