I've been looking at the various threads on the different water issues, not sure that this has been covered already. My issue is that we have had restrictions like most others. However during these restrictions we have not had cold water in the upstairs bathroom/cistern not filling/shower not working. Since New Years Eve we haven't had any stop to the water supply but upstairs the supply hasn't come back to the cold tap/cistern/shower. The tank in the attic is pretty full so not sure what the problem is. Put the hose from hot to cold tap and this made its way to the cistern so don't think I've an airlock. Any advice/tips? Thanks in advance.