In this case, however, the range of fire is restricted to the only medium that matters to the light entertainment people at C4. Will a future guest be allowed to say how much they despise all those 100 Greatest marathons that clog up the channel?

As it was, Sean Lock as host and Alan Davies as star guest made a pretty good fist of the first half-hour. Davies denied that Aerobics Oz Style - the programme does exist - was "porn for cowards". "It's a lovely show," he insisted. "It's artistic and it's for children as well."

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