I was able to Google a larger image of this Twinings Earl Grey packaging.
At first, I figured this British mainstay would certainly not stray far from Gill Sans. Wrong: the curve at the bottom of the f suggests more of a Martin Majoor typeface. FF Scala Sans Italic is close but no cigar. Majoor's Nexus is even closer … and yet no. FF Eureka Pro Italic by Peter Bilak is also in the neighbourhood but not quite right.
I feel like I'm gonna slap my forehead as soon as James Millner effortlessly identifies the correct font.