Hi, thought an update would be useful, brilliant engineer Lee called. He had not heard of this problem, advised me to check with another landline to rule out the home telephone. This I did will the same results no caller ID, he left his mobile number with me to confirm. He contacted me and confirmed someone close by had the same problem so it was a network fault. He again phoned to say the fault had been rectified and upon checking I found that it had. A great result and first class service. Thank you Virgin.