Big company announcement yesterday: projector plus screen, tripod-mounted speaker, the works. First email, two days in advance, said kick-off was 10am.

Follow-up email, the day before, said 10am GMT, in bold. Much confusion ensued.

Then got this at 9.30am (BST):

Just to confirm that this Announcement shall take place in 30 minutes - at 10.00 AM UK TIME

Ah, the joys of unambiguous communication in a small company.