I went to a previous lecture in this series and it was free of charge. Now there's a £10 per person registration fee.
rts.org.uk/.../rtsiet-public-lecture-sir-paul-nurse
It may be well worth the fee but in principle both IET and RTS lectures are normally free to attend. This strikes me as a rather odd policy decision, presumably taken by both organisations jointly. I'm a member of both organisations and can't say that I'm impressed.
Jeffrey Borinsky
www.borinsky.co.uk