Русско-англо-русский юридический словарь

A party or the legal representative of a party, on behalf of and upon the instructions of that party, may communicate information relating to the proceedings to any person where necessary to enable that party [...] (legislation.gov.uk)

Legal Representative

In its broadest sense, one who stands in place of, and represents the interests of, another. A person who oversees the legal affairs of another. Examples include the executor or administrator of an estate and a court appointed guardian of a minor or incompetent person. (West's Encyclopedia of American Law)

legal representative

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2. A person (now usually a barrister, solicitor, or attorney) responsible for representing another, or an establishment, in a legal capacity. (Oxford English and Spanish Dictionary)