Two reasons for possible panic on this mission.
Firstly would everything on Ms K's shopping list would all fit in my panniers or not? Especially knowing how big a family size bag of popcorn can be! And the answer was a comfortable yes.
And secondly with a 15min bike ride from Tesco to Ms K's home I was also hoping I'd get the frozen stuff there in time before it started thawing. Didn't specifically check as I handed over the carrier bags, but I'm guessing it was alright! Ms K was really grateful for the help. And I got a nice 13km round trip bike ride in the beautiful sunshine.