Many thanks for information. Yesterday I popped in to a Orange phone. Assistant took out sim card and put it back into phone. refered to to possibility that network could be overloaded, i.e network deals with EE , T Mobile and Orange.
Question Author.
Thanks Brum Lady. looking at your user name could you be from the West Mids.
I too come from that area. For the past few days No Network on phone!! EE came up on screen now T Mobile.