The Great British Treasure Hunt master and mistress have sussed it!
🎉 I've cracked Level 5 of The Great British Treasure Hunt!
🔍Join the Hunt: https://t.co/HsloCaDVWt
https://t.co/4rB6oDb3Y0
@richardosman just watching HoG from last night. That photo wasn’t litmus paper - it was universal indicator paper according to my science teacher mistress. Litmus can only be red or blue and doesn’t measure pH!