A British theatre is pricing tickets based on demand:Anyone who uses budget airlines knows that the earlier you book your ticket, the better the deal you get. What would happen if a similar pricing strategy was applied to theatre tickets?For all 27 performances, the first 20 seats will be sold on a first-come-first-served basis at £10 each, the next 20 at £20 and so on, until only the final 20 seats are available priced at £30 each.(from Guardian Unlimited).Follow me on Twitter or subscribe to the feed