This short analytical note considers various aspects of parliamentary opposition in the UK (and other Westminster style systems), to identify certain lessons that may be appropriate for Ukraine at the current stage. The key argument is that although there are certain formal procedures used in Britain that could be applicable to Ukraine, perhaps the central lesson demonstrated by the British system is the importance of a good working relationship between the government and the opposition parties on a day-to-day basis on a less formal level. For this reason, changes to Ukrainian legislation, such as a new ‘Law on Opposition’, can only be a partial solution, if that, and more thought should be put into how to create conditions (that become traditions) for constructive cooperation between the Government and the opposition.