https://www.gov.uk/government/publications/7-lenses-of-transformation/the-7-lenses-of-transformation
This page provides an overview of the 7 lenses approach taken by the government to implement the transformation strategy goals as set out "how the government will use digital to transform the relationship between the citizen and state." https://www.gov.uk/government/publications/government-transformation-strategy-2017-to-2020/government-transformation-strategy

https://ntouk.wordpress.com/2015/05/07/a-brief-history-of-uk-government-moves-towards-a-platform-based-architecture/#:~:text=The%20initial%20site%20was%20%E2%80%9CUKonline%E2%80%9D%2C%20replacing%20the%20early,prior%20to%20its%20formal%20launch%20in%20February%202001.