pp. 47 - Revenue £ 10.9 bn in 2019 - exchange rate in dollars as per 8th Feb 2021
More info on GRI 201-1 in GRI index 2019
https://assets.ctfassets.net/5ywmq66472jr/2SPRRF9gZuaMwXJFxKLKKj/573b714e0753db86e0faa86b2218bd5e/GRI_Index_2019.pdf