By way of time out from the annual slog of summer exam grading, I managed to hear an episode of the new format 'I'm Sorry I Haven't A Clue'.

Humph has been replaced by Stephen Fry - a predictable and safe choice (I'd have prefered the rumoured-to-be and riskier Chairman Jarvis Cocker).

It's still funny and Fry is - as always - good. However, the script retains the previous style and that's the problem. Lewd jokes are not necessarily funny - especially when they're so in your face. The magic of ISIHAC was lewd jokes being said by Humph - that establishment Etonian voice, that avuncular manner, that air of innocent bewilderment. Humph's great talent was to seem to be in the wrong place for the entire thirty years or so, biding his time until a real presenter came along. The problem with Fry is that he is so eminently good at chairing. The jokes are executed too knowingly, they're the kind of cracks he'd say. Fry is - of all things - too straight.

The solution? Drop it altogether? Maybe. Or alter the style - let Fry evolve his own mannerisms, his own 'take', play off being so utterly well known and omnicompetent - not ape The Inimitable Humph.

Like Tommy Cooper - the skill is in getting it wrong so well.