Remember, if it's hot then you may become ill, and if you fall ill while on a train it'll have to stop, and that could cause significant disruption, and it'll all be your fault. If we all carried a bottle of water with us, then these dehydration-related delays could become a thing of the past.
But conversely, you probably won't fall ill on a train as a result of overheating, only a handful of the millions of passengers on the tube each day ever do. Individually, carrying a bottle of water every time you travel is a complete waste of money. But collectively, from TfL's point of view, if we all wasted our money on bottled water twice daily then Londoners would get around more easily. So you can see why they ask.
Around four million passengers travel by tube each day, so these free bottles will reach barely 7% of the target audience. Also notice that they're not all being given out today, which is a pity, because the more bottles you can give out on the hottest day of the year the better.
I don't know about you, but carrying water with me every time I travel by tube wouldn't be a small change to my travel habits. I'd have to buy a bottle every time I travel, which would delay my journey by having to visit a shop, or else I'd have to stock up at home and then carry the bottle around with me all day, either weighing me down or getting in the way.
Or of course TfL could give away empty refillable bottles which we could all use again and again using tapwater. That'd be a brilliant way to drive the campaign home, and much more eco-friendly. But this'll never happen because it'd cost money, which TfL doesn't have. Or alternatively the bottles could be sponsored, except no bottled water company is ever going to sign up for that, obviously.
Interestingly <Drinks company> is not the same drinks company which paid for a sponsored makeover of Canada Water station last year. TfL don't genuinely believe that one brand of bottled water is better than another, they simply take the money off anyone who's willing.
Hang on a second. Thanks to a major programme of investment, almost complete, air-conditioned trains already form the great majority of rolling stock on 40% of the Underground network. If your journey today is on the Metropolitan, Circle or Hammersmith and City lines you don't need a bottle of water to cool you down, and if you're on the District line you probably don't. Bottles of water are only of potential use in preventing alarm-pull delays on the deep level tube, where yes, conditions today may be pretty bad. But TfL's advice covers all tube journeys, because the organisation believes in simplicity, rather than 'confusing' the travelling public with something more specific.
And this, this is the point of the entire exercise. Bryan's team has come up with a meaningless 'Live Young' slogan, and now they get to shoehorn it into a press release in the hope that media outlets no longer staffed by journalists will cut and paste their words and regurgitate the slogan in front of a vast target audience. There wouldn't be any free bottles, nor any press release, if Bryan's brand didn't have a campaign to promote.
But this is bloody excellent advice. Don't be an idiot and slow down an entire tube line by staying on the tube if you're unwell. The staff at the next station might even have some water to perk you up, and see you on your way.