The 2018 Dunlop MSA British Touring Car Championship was a motor racing championship for production-based touring cars held across England and Scotland. It was sponsored by Dunlop. The championship featured a mix of professional motor racing teams and privately funded amateur drivers competing in highly modified versions of family cars which were sold to the general public and conform to the technical regulations for the championship. The 2018 season was the 61st British Touring Car Championship season and the eighth season for cars conforming to the Next Generation Touring Car (NGTC) technical specification. The 2018 season also marked the 60th anniversary since the series’ introduction.

The 2018 Renault UK Clio Cup is a multi-event, one make motor racing championship held across England. The championship features a mix of professional motor racing teams and privately funded drivers competing in the Clio Renaultsport 200 Turbo EDC that conform to the technical regulations for the championship. Organised by the British Automobile Racing Club, it forms part of the extensive program of support categories built up around the British Touring Car Championship. It will be the 23rd Renault Clio Cup United Kingdom season and the 43rd of UK motorsport undertaken by Renault and Renault Sport. The first race takes place on 1 April at Brands Hatch on the circuit's Indy configuration and concluded on 30 September at the same venue, utilising the Grand Prix circuit, after eighteen races held at nine meetings.