In the recent series with Heston Blumenthal & Little Chef, Mr Pgler (MD of Little Chef) kept referring to "Blue Sky Thinking".Is this a recognised expression,or just something he has thought up?
thinking that is not grounded or in touch in the realities of the present; open-minded thinking (i.e., as wide and clear as the blue sky)
en.wiktionary.org/wiki/blue-sky_thinking - Definition in context