Largely tend to ignore the instructions on most beer kits. Main thing that is important with Cwtch is putting the first lot of hops in at the start of fermentation after that I stuck to my usual routine, 2 weeks ferment, add remaining hops 2-3 days, cold crash 1-2 days, bottle or keg.
If bottling or using a pressure barrel and relying in secondary fermentation for fizz then I would give it two weeks somewhere warm (i.e. 20°C) for two weeks, then just move it somewhere cooler to condition until such time as I'm ready to drink it but ideally at least another two weeks.
Last lot of this I made was force carbonated in a Corny keg so didn't have to worry about the temperature. The few remaining pints that I did stick in bottles didn't carb up that well for some reason though I used Coopers PET bottles and have had similar issues with these before.
The stuff out of the keg was superb though.