I live in north east England and I have soft water. Northumbrian Water calls it 'moderately hard' but at 5 dH, fish keepers call it soft. If you mean north east England, and you are with Northumbrian Water, they no longer give the hardness in numbers since they upgraded their website last year.I live in very hardy, North Eastern I just checked the hardiness map
I have cherry shrimps, they have no problems living in 5 dH.