Thanks for that. It's in a cupboard under the stairs off our lounge, spends the majority of the time with door closed and no ventilation . Would running a dehumidifier if there on a regular basis keep the mould at bay?
We have just noticed some mould above an inside wall skirting board on one of our outside walls. The house is a relative new build less than 10yrs old.
The wall has a definite cold spot and there is an above ground air brick adjacent to the area of mould.
Is there any chance the air brick...