The writer is a relatively prominent UK developer; he certainly hasn't missed that the UK isn't in the EU.
You're likely referring to the line "Hopefully this draws a simple line in the sand for the UK government, ..."; the strictest interpretation of the metaphor is certainly muddled, but it is common in the UK to look to EU rulings and policy discussions for comparison to our own - politicians will be aware of them and will use them to help decide whether or not to test things in our own courts.
You're likely referring to the line "Hopefully this draws a simple line in the sand for the UK government, ..."; the strictest interpretation of the metaphor is certainly muddled, but it is common in the UK to look to EU rulings and policy discussions for comparison to our own - politicians will be aware of them and will use them to help decide whether or not to test things in our own courts.