His Highness Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, and British Prime Minister Boris Johnson were seen sporting Expo2020 Dubai wristbands.
The leaders wore the green Sustainability band as they attended a reception at No. 10 Downing Street in London on Thursday.
Sheikh Mohamed, who is on an official visit to the UK, held several talks with senior leaders with special focus on ways to strengthen bilateral ties between the two countries.
It comes just a day after Sheikh Mohamed was seen wearing the orange Expo 2020 Dubai band, which represents Opportunity theme, along with French President Emmanuel Macron in Paris.
The Expo 2020 Dubai wristbands come in three colours and represent different themes - green is for sustainability, orange for opportunity and blue for mobility.
Priced at AED 20, these are available at Expo 2020 Dubai merchandise outlets, all fuel stations across the UAE and on Amazon.com.
Expo 2020 Dubai will open its doors to the world on October 1.