I'm playing around with this idea. I know it's simple, but sometimes beer should be.
1 x 1.8kg Muntons Bitter Kit
500g DME
250g Crystal 60 (steep@68deg for 30min)
22L with a 5 liter boil
Hop additions: 30g Fuggles for 30min , 10g at flameout should add another +-5 IBU to the kit...