The standard UK Phraseology for ATC to instruct an a/c to go around, is "ABC123 go around, I say again go around", as far as I know there's no range at which it can or cannot be used.
However it's generally used if the a/c has to go around from short (4nm or less) final and will thereafter include an instruction to climb & turn as the traffic situation dictates.
If your range on final is greater than 4nm, you probably wouldn't be sent around as such and the phraseology will differ slightly to fit the situation, ie "ABC123, radar" "terminating the approach, turn right heading 120 degrees, maintain 2000ft".