Great Britain fits a lot into a small area, and the differences between its parts are real: London operates at a different scale from anywhere else, Edinburgh and Glasgow give Scotland two very different characters, and the northern English cities — Liverpool, Manchester, York — carry industrial and maritime history that the south largely lacks.
The guides collected here cover London, Edinburgh, Glasgow, Liverpool, Manchester, York, Cardiff and other destinations. Rail links the major cities well, and advance tickets cost a fraction of same-day fares. Weather rather than season is the usual constraint — daylight is short from November to February, which matters for coastal and countryside plans more than for museums, most of which in London are free to enter.