You will have called beforehand to book an arrival slot so they know to be expecting you around x 'o'clock.
- Norwich Radar G-LUCA inbound request basic service
(or traffic service if the vis is poor and you have a transponder)
They'll come back to you with
- G-LUCA squawk <something> pass your message
You can then say what you are, where you're from and to (inbound Norwich), where you are, conditions (VFR) and give the ATIS Letter and pressure setting that you'll already have before you called them because you listened to that first.
This will tell you the runway in use, QNH, surface wind, cloud base etc. if you aren't happy in the circuit it's perfectly fine to ask for the QFE if that helps you.
Once you're established in contact with your Basic or Traffic service, they know you're inbound so they will clear you into the zone for a VFR join to the circuit. It won't be an overhead join, it'll be a downwind join or a left or right base or even a straight in, depending on their traffic and runway in use.
Be prepared for them to ask you to hold at a VRP. Know where they are on your chart so you're not surprised by them. They may ask you to do this while they get other traffic in or out, and then ask you to come in and land.
Good luck and enjoy - it's not cheap to land there but the handling people at Saxonair are really lovely.