I find difficult to get a UK keyboard (a place I bought my laptop) , Here in Oman (Middle East) ..
It can be replaced with a Middle Eastern kb. You can call the number below for support options in Dell Oman. They may be able to help you with information on where to get a kb. You may also be able to have a friend or family member in the UK order you a keyboard and mail it to you. Check to make sure there are no trade/shipping restrictions before proceeding.
968 2456 7922
Sunday-Thursday, 9 AM-5:30 PM
United Kingdom|United Kingdom
8 AM – 6 PM Monday to Friday