http://www.arb.org.uk/reg
istration/prescribed-exam
ination-process-documents
.shtml
some info can be found here:
and
http://www.riba.org/go/ri
ba/member/joining_18.html
first get your pt.2 approved (test?) and then rip yer tousch on the pt. 3
you probably know all about the costs
goodluck.