Did a bit of a Brew Trial for work today, the brew went well...
It was a 4.1% Stout with Pale, Crystal, Torrefied, Roasted, Black. Bittered with Fuggle, Last 15mins with Golding, Flame-out steep with Fuggle. Water treatment added to mash to the GW Calc Stout profile minus the common salt.
I ended up with a FV that was too full and my Mash efficiency was through the roof, checked with both Refractometer & Hydrometer my Pre-Boil wort was (11Brix) 1.042 (Wort in the Copper 31 Litres) and I was only aiming for 1.045 Starting Gravity, BeerEngine says my efficiency was 94%...
End of Boil I had to liquor-back.

Yeast was Nottingham.
Bottled up two previous brews so quite a busy day.