The SAR cannot be sent electronically outside of the US. Or at least it couldn't when my boyfriend applied 2 years ago.
It needs to be physically sent to the university. Which you can do yourself if you've received the SAR
In my DB's case he had recieved the SAR but didn't realise what it was...
until I started nagging him
then he'd lost it and had to request another copy which he then sent to his uni. So check to see if you've already had your SAR.
I'm 99% positive that it can't be sent electronically outside of the US even if there's a school code for the UK school in the FASFA system.