Thanks Spec, if you look at the attachment PoerSuppy3, if I switch SW10 the relay closes, if I open SW10 the relay opens.
If I close SW10 the relay closes, then SW7 holds the relay closes and SW10 can be release without the relay opening. When sw7 is opened the relay opens.
This worked ok until I made the changes suggested, apart from the transistor being damage. But now when I switch SW10 and open it again the relay stays closed.
I don't understand why?
Jason.