I'll report back in a week if the Marks & Spencer ones cause any ill-effects with the security scanners. As part of my son-in-law duties I have to acquire the traditional puddings in GLA & ensure their safe travels back to YVR now that M&S closed shop locally.

Wish me luck or GLA/LHR/YYC/YVR security will have to answer to my mother-in-law if I return home empty-handed!