Boris Johnson served as Prime Minister of the United Kingdom, Leader of the Conservative Party, Foreign Secretary and Mayor of London.In 2022, Johnson emerged as the preeminent global leader in the effort to support Ukraine in its fight against Russian invasion. Under his leadership the UK committed more than £2.4 billion in military assistance, huge humanitarian support and became Ukraine’s foremost European political partner. Mr Johnson has remained a key ally of President Volodomyr Zelenskyy, and a firm advocate for Ukrainian NATO membership.