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UPDATE 1-Britain says all Brexit options on the table - including unilateral ones

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LONDON, July 19 (Reuters) - Britain's Brexit minister said on Monday that all options were on the table in talks with the European Union including the invocation of Article 16 of the Northern Ireland Protocol.

Asked about Article 16, Frost said: "You'll have to wait and see precisely what we say on Wednesday but certainly all options remain on the table now and in the future."

(Reporting by Guy Faulconbridge)