<ul><li><a href=https://www.barstandardsboard.org.uk/media/1663630/bsb_handbook_complete.pdf target=_blank>Bar standards Board Handbook(Bar standards Board Handbook, last updated in February 2018, Guidance on Rule C19, gC57)</a></li><li><a href=http://www.sra.org.uk/solicitors/handbook/code/content.page target=_blank>Solicitors Regulation Authority Code of Conduct(Solicitors Regulation Authority Code of Conduct  2011, last updated in October 2017, Chapter 8 Publicity)</a></li></ul>