As an interesting edge case, in an auction contract can be formed without words either: it is formed on the "fall of the hammer" https://www.legislation.gov.uk/

As an interesting edge case, in an auction contract can be formed without words either: it is formed on the "fall of the hammer" https://www.legislation.gov.uk/ukpga/1979/54 https://www.legislation.gov.uk/ukpga/1979/54