Wikipedia:-

Prenuptial agreements have historically not been considered legally valid in England. This is still generally the case, although a 2010 Supreme court test case between the German heiress Katrin Radmacher and Nicolas Granatino,[3] indicated that such agreements can "in the right case" have decisive weight in a divorce settlement.[4] The Law Commission is due to consider whether a change should be made to the letter of the law, recognizing prenupts in a more general way; they will report on the matter in 2012.