Because we ship internationally and international rates all depends on weight, our shipping table rates are Weight vs Destination
But i'd like like to have free shipping options for UK purchases over £500
Free shipping option for EU purchases over £1000
can someone help guide me on how to do this?
What do you want check is Promotions > Shopping Cart Price Rules
Create condition for minimum price and shipping address and set actions: free shipping. It may take some trial and error, but it's no rocket science.