Some fairly good examples of 'how not to say it' from the PA system on the Tube (the first three are not new, but are still capable of making me wonder at the thought proceses behind them):
"Please use all available doors" - well, OK, but we'll probably be here until midnight, especially if everyone tries to do this.
"Please use alternate routes" - that doesn't sound like a quick way to get home either...
"Please use all available space" - it's no good, I've tried, but I just can't seem to activate my self-expanding switch.
"The District Line is behind" - behind what?
(Having just left Acton Town on the westbound service) "This is Wood Green" - OK, right line, wrong end (like 20-odd stops away, and getting further by the minute).
"This train is being held here due to a train at Oxford Circus with no movement" - obviously a new model.
This was followed a little later by a very exasperated
"We are still experiencing delays because of this defective train, which is making its way to Liverpool Street where it will be taken out of service AND PUT AWAY IN A SIDING! "- for ever, left up to him, I'd guess.
"Due to a signal failure at Waterloo, the Waterloo & City Line is suspended and a good service is operating on all other lines" - there, I knew it. They don't have enough power to run the whole trainset at once!
And last but certainly not least
"This train will proceed one station at a time" - you don't know how relieved I am to hear that, exciting though it might be to zoom through the seventh dimension over Hammersmith...