Erratum to: FIGARO: The new horizontal neutron reflectometer at the ILL R. A. Campbell, H. P. Wacklin, I. Sutton, R. Cubitt and G. Fragneto Eur. Phys. J. Plus, 130 10 (2015) 220 Published online: 30 October 2015 DOI: 10.1140/epjp/i2015-15220-4