Just how warm do they serve their ales in England? They're at least "cool" aren't they?

Bigjohn, I didn't touch the CO2 pressure from what it was when it came to me (6-8 lbs/in???). I had some foaming initially with the first keg (Karl Strauss Oktoberfest) so I turned off the CO2 and let the beer flow naturally for a day or two. When output reduced to a trickle I turned the CO2 back on - no problem.
Maybe your uncle just has it cranked too high?