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Some of you have written in about the sound on last night's programme - here's Simon Enright, the producer of the programme, to explain what happened:

"Some viewers have contacted us to say that they were frustrated that they couldn't hear the opening comments of several of the contributors.

You can imagine that we were incredibly frustrated too as we tried to sort the problem out from the live Outside Broadcast truck in Leicester.

To explain, it had nothing to do with the venue and there was certainly no conspiracy on our part to censor some of the politicians.

It was a technical problem with the microphones. Some of the most serious sound problems were with the main politicians.

They all had personal microphones on. When these didn't work the sound engineers on the location floor had to run from their positions at the back in the audience to hang mics above their heads. This caused the delay in you hearing them.

We know that for many of you this spoilt your viewing of the programme - and for that we are sorry. And although we can never promise, we hope not to have those problems again."