So as an update I brewed up my mild on Sunday. The brew day went well the only difficulty was maintaining my mash temperature as my kettle was only 75% full. I decided to add some oats to give that creamy feel along with some sweetness. Have I now turned this into an oatmeal stout? The Biabacus was spot on with the gravity and volume estimates as I ended up with an OG of 1.035 as opposed to the 1.036 predicted.
Also keeping in line with that sweet creamy feel I changed the yeast to west yorkshire as its attenuation is 71%. The yeasties have been churning away for two days now I plan on leaving in primary for two weeks before transferring into my serving keg/secondary for another week of conditioning. Will try to resist drinking it all during that time

The recipe with the changes I made is attached below.
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Likkle Brixton - Batch 1
Recipe Overview
Style: English Mild Ale
Original Gravity (OG): 1.036
IBU's (Tinseth): 22
Bitterness to Gravity Ratio: 0.61
ABV%: 3.48
Efficiency into Kettle (EIK): 89.4 %
Efficiency into Fermentor (EIF): 70.7 %
Times and Temperatures
Mash: 90 mins at 67.9 C = 154.2 F
Boil: 90 min
Ferment: 14 days at 20 C = 68 F
Volumes & Gravities
Total Water Needed (TWN): 24.98 L = 6.6 G
Volume into Kettle (VIK): 24.41 L = 6.45 G @ 1.027
End of Boil Volume - Ambient (EOBV-A): 17.7 L = 4.68 G @ 1.036
Volume into Fermentor (VIF): 14 L = 3.7 G @ 1.036
Volume into Packaging (VIP): 12.2 L = 3.22 G @ 1.009 assuming apparent attenuation of 75 %
The Grain Bill
73.9% Marris Otter 1778 grams = 3.92 pounds
9.2% Crystal 80L 222 grams = 0.49 pounds
6.9% Flaked Oatmeal 167 grams = 0.37 pounds
4.6% Chocolate 350L 111 grams = 0.24 pounds
3.5% Chocolate 420L 83 grams = 0.18 pounds
1.8% Black Patent 44 grams = 0.1 pounds
The Hop Bill
11.5 IBU Fuggles Pellets (4%AA) 17.7 grams = 0.625 ounces at 60 mins
8.6 IBU Williamette Pellets (3%AA) 17.6 grams = 0.62 ounces at 60 mins
1.9 IBU Fuggles Pellets (4%AA) 5.9 grams = 0.209 ounces at 15 mins
Fermentation& Conditioning
Fermention: West Yorkshire Ale for 14 days at 20 C = 68 F
Req. Volumes of CO2: 1.8
Serving Temp: 4 C = 39.2 F
Condition for 7 days.