Originally Posted by
ceejay_za
I've had teeny tiny nail scissors allowed in one direction, confiscated on the return. According to my research, knitting needles are allowed by the TSA, but not by Heathrow securityl. I've given up on expecting consistency

Nope - knitting needles are
specifically listed by Heathrow as permitted. There is some non-official site out there that lists them as forbidden, but they have been allowed for several years now