The public impression is that the government, industry or the highest bidder can buy a scientist to add credibility to any message. That crucial quality of impartiality is being lost.

That difficult start drove me on to inspire children and let them know that it is never to late to repair a bad experience at school, and once you get your head down and start to read books, you can really achieve.

Discrimination due to age is one of the great tragedies of modern life. The desire to work and be useful is what makes life worth living, and to be told your efforts are not needed because you are the wrong age is a crime.

There are not the same factual shows anymore - children's TV has become much more trivial.