Mark can be contacted via
- His theatrical agent for TV presenting and scripts Michèle Milburn @ Milburn Browning Associates
- His agent for speaking engagements Tom Kenyon-Slaney tom@londonspeakerbureau.com at The London Speakers Bureau, +44 (0)20 8748 9595.
- His literary agent for books Charlie Viney @ The Viney Agency
Or directly at mark@optimistontour.com