Hi cuties think I have found the problem causing my thread to break as some of you may know who have kindly helped with trying to finding out the reason.

Thought I would let you know in case any one else has similar problem it is worth looking at to see if it is the same I removed the out side casing so I could see what was happening with the thread tension and noticed every time the thread had been caught on a very very small lip of plastic and buy the time it got to the needle for sewing was frayed so badly it just broke it had with friction cut a groove in this small lip of plastic so causing the fraying.
I can't see any reason for this tiny bit of plastic only to give a little more support for the out side casing to rest on but I don't think it will make any difference if it is removed as it really is no bigger than the end of a tacking pin and hopefully will stop the thread catching on it, since being aware of this problem my machine is now back to sewing beautifully.
Can only think it is a frozen shoulder that has caused this problem due to me having trouble lifting my arm up to thread the machine and may be getting the thread caught up on this lip of plastic to start with.
Another thing to look for though if you have similar problems