Hi Pollyanna,
Since you purchased from our local distributor, kindly note that if we change your Little Reader curriculum content from English (US) to English (UK), you will no longer be able to use the US license key and content CDs included in your LR box. Instead, what will happen is you need to download your UK content from your Account page (we will not send you a set of UK content CDs). We will also provide you with a new license key for your UK content.
If this is alright with you, please save a backup of any personal or downloaded lessons that you have, and when you're ready to switch your content just submit a request for this at our Support Helpdesk:
http://support.brillkids.com/requests/new (make sure you are signed in to your BrillKids Account when you visit the link).
We look forward to receiving your request!