Yesterday i had no cold water at all in my bathroom. The hot water was working in the bath but not the sink and the toilet wouldnt refill after flushing. I attached a hose to the cold water and forced water into the system ( which is oil fired ch with feeder tank in loft and cylinder beside bathroom). This seemed to work for a while but this morning I now have no hot or cold water at all upstairs. My pipes were fine throughout the cold spell so I don't think its anything to do with that.
Any solution would be welcomed.