On such a miserably hot day, why not look at some archive footage of the Chelsea Flower Show, & discover the source of British patience? If you feel like it, you can also look at the shows of 1936 (nifty clothing) and 1966 (colour!), but I'm quite happy with this one, with a brand new queen.
http://www.guardian.co.uk/lifeandstyle/video/2010/may/24/chelsea-flower-show-1952?intcmp=239
