Does your mate have a Freelander2?
This "story" has been on a few sites but I don't think he is getting very far with it, and it doesn't seem to be a fault that is common. Certainly not been mentioned on the FL Club site.
If your mate has a Freelander1 pre facelift model, I would suggest he checks the condition of the wiring below the gear lever. It is a fairly common fault that the wires snap or pull out of the switch. It is also worth checking whether the brake light switch is working properly, but this seems to be affecting post facelift models more.
Edit:
Just read the article again and perhaps he is talking about FL1, but it isn't very plain and very misleading having the photo of FL2 at the top.
However, if the wires are broken or the brake switch faulty it doesn't make the car slow down quickly, it just makes all the pretty lights show!!
I have a feeling he bought a car his wife didn't want and then couldn't get rid of ,so is looking for problems.