The British Embassy in Vilnius published a notice on 5 October 2026 inviting senior school students whose primary country of residence is Lithuania to apply for its Ambassador for a Day 2026 programme. Applicants had to be aged between 16 and 19 on 1 December 2026, regardless of gender or social background.

Entries were to be original videos of up to 120 seconds in English, uploaded to YouTube as "Unlisted" and submitted through an application form, with one video per participant. The embassy said an independent jury would look for personal, clearly communicated and inspiring entries rather than technical quality. The deadline stated in the notice was 3 November 2026 at 11:59pm local time.

The embassy said winners would meet the Ambassador, engage with embassy staff and attend meetings with senior diplomats and partners, with reasonable travel and accommodation covered for each winner and one chaperone. It noted that dates or plans could be adjusted, and that written consent, including parental consent for those under 18, would be sought.