Re: This particular part of - there are three legal systems within the UK, England & Wales; Scotland and Northern Ireland; though England & Wales* (where this was ruled) accounts for over 80% of the population and probably a greater proportion of businesses and contracts.
They also have a common enough history and basis that it's unlikely that rulings in Northern Ireland and Scotland would be substantially different.
* Wales now has it's own legislature so Welsh law may have minor differences in certain areas but this wouldn't be one of them as it's not an area the Welsh assembly have law making power over.
