Oven failure. Have this oven 10 years. Suddenly this evening about one hour after using the grill

Question

Have this oven 10 years. Suddenly this evening about one hour after using the grill the cooker is "dead". No time in the display, and no gas coming in when the k**b is turned to either grill or oven. Nothing on bottom oven either. Have checked fuse board - all ok! Have checked electrical switch on wall - it's in the "ON" position. My gas supply is fine because central heating is working.