Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event by Heywood, I, Camilo, F, Cotton, WD, Yusef-Zadeh, F, Abbott, TD, RM Adam, MA Aldera, EF Bauermeister, RS Booth, AG Botha, DH Botha, LRS Brederode, ZB Brits, SJ Buchner, JP Burger, JM Chalmers, T Cheetham, D de Villiers, MA Dikgale-Mahlakoana, LJ du Toit, SWP Esterhuyse, BL Fanaroff, AR Foley, DJ Fourie, RRG Gamatham, S Goedhart, S Gounden, MJ Hlakola, CJ Hoek, A Hokwana, DM Horn, JMG Horrell, B Hugo, AR Isaacson, JL Jonas, JDBL Jordaan, AF Joubert, GIG Józsa, RPM Julie, FB Kapp, JS Kenyon, PPA Kotzé, H Kriel, TW Kusel, R Lehmensiek, D Liebenberg, A Loots, RT Lord, BM Lunsky, PS Macfarlane