What is the strongest coffee brand in the UK?

What is the strongest coffee brand in the UK?

Very Strong Coffee is the UK’s strongest coffee, packing 1350mg of caffeine per mug, which is 249mg more caffeine per serving than the next strongest coffee. Coffee has the highest caffeine content, with 90 mg per 200 ml cup of brewed coffee. Espresso has around 80 mg per 60 ml. Black tea has about 55 mg per 250 ml cup, and green tea slightly less.