Although many have tried to copy their successfulformula in recent years, the original is still the best.
The Sun (2010)
When you have a successfulformula, why change it?
The Sun (2013)
It has been a surprisingly successfulformula.
Times, Sunday Times (2011)
Definition of 'formula'
formula
(fɔːʳmjʊlə) (fɔːʳmjʊliː)Explore 'formula' in the dictionary
singular noun
A formula for a particular situation, usually a good one, is a course of action or a combination of actions that is certain or likely to result in that situation.