Chris Langham is one of my favourite comedians. I have not yet seen Help, but thoroughly enjoyed People Like Us, and also his work with Caroline Quentin.
I am so sorry to hear that he has been involved in downloading live video of children being sexually abused.
I see he used the same excuse as Pete Townshend [note that H, by the way]: it was for research purposes.
If a person were genuinely researching child pornography, he would have to do it in a controlled environment, with supervision, wouldn't you think?
His sentence of 10 months does sound very low when you compare it with people being gaoled for over a year for putting graffiti in a public place.