Here a list of documents and where to find them:
Birth certificate for births registered in England, Wales, Scotland & Northern Ireland,
Marriage certificate for marriages registered in England, Wales, Scotland & Northern Ireland,
Death certificate for deaths registered in England, Wales, Scotland & Northern Ireland,
Civil partnership certificate for events registered in England, Wales, Scotland & Northern Ireland,
Adoption certificates for events registered in England, Wales, Scotland & Northern Ireland,
Commemorative marriage certificates for silver, ruby, golden and diamond wedding anniversaries.
Decree Absolute or Final Order for divorce, dissolution or annulment.