Caffeine in tea, typical mg per cup, with sources.

Approximately 40-45mg per 200ml cup from one Tetley Original bag. Tetley Decaf is 2-3mg.

Approximately 45-50mg per 200ml cup from one pyramid bag. PG Tips uses Kenya-led blends.

Yes, but not radically less. A bagged green tea is typically 30-40mg per 200ml cup, against 40-55mg for a bagged black. The difference is real but smaller than most people assume, switching from one strong black tea per morning to one strong green tea drops your daily intake by maybe 15mg.

No. Decaf processing removes most caffeine, but a small amount normally remains. Caffeine content varies by product and brew. During pregnancy, follow current NHS guidance on total daily caffeine and ask a midwife or clinician if you are unsure.

Strong Assam loose-leaf brewed long is the highest commonly-available tea, around 60-80mg per 200ml. Matcha tea has 60-70mg per bowl because you consume the powdered leaf. Yerba Mate (technically not tea but often listed as such) is around 80mg.

A typical filter coffee is 80-100mg per 200ml, espresso is 60-80mg per 30ml shot. So one filter coffee is roughly the same as two strong cups of black tea. Tea also contains L-theanine which softens the caffeine release, most people report that two cups of strong tea feels less "jangly" than one filter coffee.