[coypoo]

This is what I use for my English Browns, more specifically So. english Brown

Calcium (Ca)= 105.0
Magnesium (Mg)= 17.0
Sodium (Na)= 23.0
Sulfate (SO4)= 66.0
Chloride (C1)= 30.0
Bicarbonate (HC03)= 153.0

for a brown ale wouldnt you want the cl:s04 to be the other way around?

[hopfenundmalz]

I looked it up and Samuel Smith's Nut Brown Ale is brewed in Yorkshire England which is the Burton Area. I'd say if you Burtonize your water you ought to be pretty close.

You are about 90 miles off on your location.  Burton-on-Trent is in Stratfordshire.  Tadcaster is in North Yorkshire.

The waters will be considerably different.