hello ali,
yes,you have to pass life in uk test.there is 2 books on available,one is just coming up on 20th march and covering unit 2+3+4+5+6,other book is old one which is unit 2+3+4,you can take your test both unless you need to tell the test center which book you did study,so they will put the question from which you studyed.old test book test will be ending end of the june.then only new book will be able to do.if i was you try to take my exam now and pass it before goes harder.if you havent got old book,i can arrenge for you for small fee.
thanks for writing.