For all those running the latest UK Gingerbread XXKPI and tried installing this CWM with root and broke your wifi or stuck w/ a brick or bootloop now, I have good news. I did the same thing and got mine fixed. Here's what I did.
Used ODIN to flash back to original Stock 2.3.6 Gingerbread.XXKPI
I had to catch mine in a bootloop while holding VOL down + Power button, once in the download screen Used Odin to flash the firmware putting it completely stock.
Then, went here,
They have a working version of CWM with root! Download the file, put your tab in Download mode again, flash the .TAR file in the PDA field of Odin, and Voila!
I just did all that, back to complete stock GB KPI, with CWM installed with confirmed root access, and working wifi. Also just performed a full nandroid backup and everything seems to be working perfectly now!
Hope this helps others that may be stuck. Also, I'm in the US, but I guess now my tab's pretty much a UK version. I also have the firmware file available if you need that.