How badly would UK Covid vaccine drive suffer if EU stopped exports?

Ursula von der Leyen, president of the European Commission, today suggested that the bloc could start an export ban on vaccines because the continent's rollout is going so badly. https://www.dailymail.co.uk/news/article-9373341/How-badly-UKs-Covid-vaccine-drive-suffer-EU-cut-exports.html?ns_mchannel=rss&ns_campaign=1490&ito=1490