I'm giving up caffeine for Lent; not for religious reasons but I like the annual experiment in willpower. And I'm curious to see what effect, if any, it will have. I'm an intermittent coffee drinker but a prodigious drinker of tea (not quite in the Tony Benn category but I could give him a decent run for his money). Fortunately, I like herbal tea so a hot drink will not be a problem.