sometimes as high as 500% [6] . [ edit ] References ^ a b Hamlett, Jane (April 2008). "Regulating UK supermarkets: an oral-history perspective" (in English ). History & Policy . United Kingdom : History & Policy . http://www.historyandpolicy.org/papers/policy-paper-70.html . Retrieved 9 December 2010 .   ^ CLABENCB SAOTTDEBS, CLABENCB SAOTTDEBS