Roger, you probably missed it while you were celebrating your Daughters birthday last night, so watch out for the repeat of "Timeshift: How to Solve a Cryptic Crossword", coming this Sunday night on BBC4.
I thought it was fascinating and very entertaining , but at the same time totally incomprehensable. For all the good it did me, those brainiacs might just as well have been explaining Einstein's Theory of Relativitity. In Chinese.