London is expected to continue to grow over the next 20 years. Population and employment rises are likely to generate most growth on the Silverlink, Great Western link and West Anglia train operating companies, with further significant pressure on the Thameslink, South West and Great Eastern services. Pricing policy, as well as other demand management, may help, but the additional capacity required is still substantial. The speaker discusses how London might accommodate the projected increases in rail demand. The vision is for a totally integrated rail system for London.