We're here to help One more thing, and this is my personal opinion after making a number of Coconut Porter's, just put the coconut in a mesh bag and put it in your fermenter (weighed down with something - I use sanitized crystal balls as they are easier to remove when done than small marbles) for the last week. Don't waste your money putting it in the mash or boil. Again, this is personal opinion but coconut can be quite a pricey addition especially if adding it at three stages of brewing. I use the finely shredded organic desulfered (non-sweetened of course) Coconut. I use 2lbs in that last week and the coconut flavor is perfect, not weak but not overpowering and totally noticeable without having to "look for" the flavor. For a 5 gallon batch shoot for 20 liters, 5.28 gallons, in the fermenter for absorption loss but squeeze the bag when kegging/bottling with something sanitized to get additional extraction.
I found this recipe when I first started home brewing a couple years ago. After a hiatus from brewing this is going to be my first 1.5 gallon BIAB batch.
Is Nottingham yeast an acceptable substitute? Couldn't get the London ale yeast specified.