what are the chances of getting caught !

[fjmlc]

I'm hoping to start up a business based on selling a product on the internet. I'll be working from home.
I live in a council property and pay full rent, but in my lease I'm sure I've read somewhere that the premises cannot be used for business purposes.
What are the chances that I'll be caught if I start it up anyway ?
What are the likely penalties if i DO get caught!

It just seems silly that I may have to rent an ''office space'' somewhere to possibly avoid this - even though I intend to work from home on my PC!!

Ideas ? !!!

- Fee