Mr Fish. You could have asked us on the UK board ...
However the simple answer is you cannot easily get fencing, on the TV, in the uk.
If you have a Sky dish you can pick up Eurosport proper (needs dish alignment as I don't think that sky's satellites still carry proper Eurosport). You can also keep an eye out on Rai and very occasionally there are programs on some of the German or French channels. Ideally you should get a motorised dish, or dual LNB setup. Last I checked (last year) the analogue channels are STILL available if you have an old analogue receiver and LNB.
Fat chance on Cable sorry.
www.fenicngchannel.tv is your best bet - and I highly recommend it.
Chefencer you are thinking about Grandstand - which is still going and shouldn't be confused with TotP (which is a pop show). You are thinking about Des Lynam.
Transworld Sport (see Channel 4) occasionally carries a little fencing but you would have to watch it religiously. And that means exsposing yourself to the so-called alternative sports.
The BBC are covering the Kiddie Games in September. There will be fencing in that.
Any more questions?
PS: I have sat in the pub and watched fencing on the pub screen. Once just because it was on Eurosport [and the pub were willing to let me watch it - the football crowd were surprisingly ok] and the other because I was showing the World's on the pubs DVD player. So maybe you need a Gav in your area as well.
PPS: WCSN does not officially support the UK. If you know what you are doing ...