For Lithuanian papers, skip the embassy step
Documents from the UK meant for Lithuania follow a single-step certification path, not the longer embassy route. This applies to official records such as birth, marriage and death certificates issued by Leeds Register Office at 2 Great George Street. Proving that a public record is genuine does not involve any Lithuanian consular step — the UK's seal is accepted directly when it carries the right mark.
Types of documents covered
Paperwork from Leeds Register Office can proceed with an apostille from the Legalisation Office at PO Box 6255 in Milton Keynes. This covers civil records, educational certificates you earned in the UK, and official letters. Each one must be an original or a fresh certified copy, so you are not sending your only original certificate. If you need to legalize documents for Lithuania, request a certified copy from the register office.
Same-day certified copies in Leeds
Leeds Register Office issues certified copies of birth, marriage and death entries on request, often the same day you ask. For embassy legalization for Lithuania from Leeds — though not required here — you would use this fresh mark to avoid post delays. Instead, you send the newly certified copy to the Legalisation Office to receive the apostille stamp that Lithuania accepts on its own. Another option is to explore document legalization for Lithuania by post if you cannot visit in person.