Ingredients
7kg Maris Otter
1000g crushed crystal
200g torrified wheat
50g whole black
200g whole crystal
60gms Goldings
Saturday 10 May at 11.00 (at neet) added ingredients to mash tun at 74 deg c (I usually mash hot for flavour). Then wrapped the bairn up for the night

Sunday 11 May at 12.00 (I'm lazy and like to sleep) unwrapped the bairn.

Temperature down to 65 deg c a drop of 9 degs in 13 hours that will do me.

First runnings to be used for Barley wine so drained about 2 gallons off around about 1080 (at 50 deg c).

Into small boiler.

Carried on sparging to produce an ESB from remainder.

Boiled barley wine for 1 hour, cooled to 24 deg c, nice and thick wort at 1200.

Nottingham yeast used, this is the tricky bit getting it to ferment, fingers crossed.
Pros & Cons of overnight mash (my opinion)
Pros
Excellent for strong beers
Maximise extraction from ingredients
Save 2 hours on brew day
Good for doing multiple strength beers from one batch of ingredients
Cons
None that I have ever encountered
I have heard if temperature drops too low (54 deg c or less?) then risk of infection or off flavours, but I have never had this happen to me.
Bluesboy