Bill & Brenda
Conerning phenolthphalein. I have told this story before, but i think on another forum. Around the early 1970s Cadbury's made a special chocolate selection of handmade chocolates (called royal Household) to be given to the Royal family and the directors at Christmas . They were handmade, unlike the rest of the products of the factory, and, because they were not made in the normal factory, their manufacture was the responsibility of the experimental department under a very precise confectioner who spoke with a correct upper class english accent , but who actually was Swiss. These were very special, and the only product made by the company which contained alcohol . However one year, although they were kept in a locked cupboard, they were going missing at a great rate. The confectioner (who may still be alive, so I will not name) made a special batch , identical to normal, but with added phenolphthalein, and locked them awya as usual.
All the cleaners in the department were off sick for a week
mike