Spacetime colour reconnection in Herwig 7 Johannes Bellm, Cody B Duncan, Stefan Gieseke, Miroslav Myska and Andrzej Siódmok Eur. Phys. J. C, 79 12 (2019) 1003 Published online: 12 December 2019 DOI: 10.1140/epjc/s10052-019-7533-6