Did my RT a few weeks ago when converting my overseas licence. Did the exam and passed first time. 30 q's as the last guy said.
The practical is a bit odd as the symbols on the map are a bit odd and not what you think they should be ( examiner said CAA's fault- surprise, surprise ). My examiner was very cool about it and we talked about everything. He said afterwards that the initial impression counts for a lot and if you get the first call right then that helps him to make his mind up. The test was about 20 mins long. MATZ penetration, LARS, Special VFR etc and hand over the cheque.
Not hard...if you have done the prep and are confident in you RT.