11kg Patio Gas fits no problem - just got a new one ready for an Ooni pizza oven. That's the white and green cylinder made from reinforced glass fibre or something similar. Just on that, an 11kg refill from Homebase was £50!! That's gone up nearly £20 in a year, scandalous. The cheaper option is a traditional 13kg cylinder from Calor or Flogas, but even those are nearly £45 for a refill. Price gouging barstewards!