In the UK, the spots are allocated to parties rather than candidates, and determined by past election (and to a lesser extent, current opinion poll) performance

In the UK, the spots are allocated to parties rather than candidates, and determined by past election (and to a lesser extent, current opinion poll) performance. https://www.ofcom.org.uk/about-ofcom/latest/media/media-releases/2016/party-election-broadcast-regulations https://www.ofcom.org.uk/about-ofcom/latest/media/media-rele...