An evacuation is a serious incident that nearly always results in injury, i Would go with Fire 1 recommendation every time. It will be interesting to see what the problem was with the R1 door slide, the picture seems to show the door only partially open I assume a door handling problem rather than a defect, but a useful reminder that things don't always work as described in the cabin simulator, a lose hydraulic union is just one of those things.
All well handled by the crew and Blackpool fire service.