Cult
BBC One's tournament launch programme, including the Switzerland versus Czech Republic opening game, drew 3.5m, or 27% of the total audience, between 4.30pm and 7pm.
The tournament will struggle to attract big numbers after England, Scotland, Wales and Northern Ireland failed to qualify.
ITV1's first match, between Portugal and Turkey, was watched by 4m (20%) from 7.15pm to 10pm.
Over on BBC One from 7pm, Doctor Who notched up the ratings victory of the day as the second episode of a two-part story attracted 7.1m (40%).
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