They appear to be primarily aimed at the US market ("the USA's only specialist law essays service") and they have a US toll free number, list their prices to students in USD and also their payments to writers in USD. They also have a page on their website dedicated to comparing themselves to their US competition.
Yes they do seem aimed at american clinets... hmmm.
I'll be in Belmont, CA all next week on business. I have a friend that lives nearby who deals with a lot of UK customers, I'll see what he turns up for me.