Spatiotemporal invasion dynamics of SARS-CoV-2 lineage B.1.1.7 emergence by Kraemer, MUG, Hill, V, Ruis, C, Dellicour, S, Bajaj, S, McCrone, JT, Baele, G, Parag, KV, Lindstroem Battle, A, Guttierrez, B, Jackson, B, Colquhoun, R, O'Toole, A, Klein, B, Vespignani, A, CoG-UK consortium, Volz, E, Faria, NR, Aanensen, D, Loman, NJ, Du Plessis, L, Cauchemez, S, Rambaut, A, Scarpino, SV, Pybus, O