Er...why bother at all? Some people - including the press - seem to think that shifting the clock really gives us extra daylight. The Earth moves perhaps? Surely it isn't beyond us to start a little later on the dark mornings and finish a little rearlier on dark evenings; then compensate for this by working a little longer when the light returns. End of nonsense...
I can't understand the farming argument either: surely the cows don't adjust their udder clocks.
Doc John