Hi. Can anyone help.. I had a 2-way switch for my landing light which never worked properly - the downstairs switch worked on and off; the upstairs switch only worked when the downstairs switch was off. I have now fixed it so it works properly. But I have now got 2 problems: first, one of the bedroom lights no longer works so I assume it is next in the circuit. Any ideas how I should rewire it? Secondly, I discovered that the 2-way switch was installed with 3-core only. I think the earth wire might have been used for L1. Either way there is no earth earthed. Can it be made safe or should I remove the 2-way altogether. If so, would fixing the bedroom light be any different? Help much appreciated.