Grocer Casino and investment bank ING have signed an agreement giving Casino a call option on ING’s 5 per cent stake in Dutch grocer Super de Boer.

The call is exercisable at any time until June 30, 2010, at a price of e5 (£4.55) a share.

A previous call option for Casino on a 6.2 per cent stake held by ING, RBS and Rabobank expired on March 31.