Hello everybody,
I'm exactly in the same situation of Julio, except that i'm working for Italian clients.

My ex-accountant in Italy told me that I need a code (GB plus a 9 or 12 digits number), exactly the same they asked to Julio. I have no idea what this identificative code is and I tried to take information in HMRC site, without success. Nobody in UK seems to know about this number...

Any idea?

Thanks very much