A by-election was held in the Bermondsey constituency in South London, on 24 February 1983, following the resignation of Labour MP Bob Mellish. Peter Tatchell stood as the candidate for the Labour Party, and Simon Hughes stood for the Liberal Party. Following a bitter campaign, the Liberals made huge gains and took the seat, with a majority of votes cast. Labour's vote fell from 63.6 per cent in May 1979 to 26.1 per cent as Tatchell came a distant second, while the Conservative candidate, Robert Hughes, managed only fourth place. With a swing of 44.2%, the 1983 Bermondsey by-election remains the largest by-election swing in British political history.

Systems design is the process of defining the  architecture, components, modules, interfaces, and data for a system to satisfy specified requirements. Systems design could be seen as the application of systems theory to product development. There is some overlap with the disciplines of systems analysis, systems architecture and systems engineering.