Welcome to the forum.
Didn't see any photos uploaded, so that might help.
First, there was no official RE Clubman model, but Watsonian Squire did a short run of Clubman Specials. Also, Hitchcock had a Clubman body kit for a while. It is likely it is one of those, being a 2002 model.
The Pete Snidal maintenance manual should be a help.
There are many answers here in the archives which can be searched out using the search function. I suspect that will be your best source.
Also, just ask some questions here in this section of the forum. We have already answered practically everything that could be asked, and could still be of some help to a newcomer.