Thanks, Steven. It's reassuring to hear that the team are working on it. It was suggested that we change our number but we are not keen to do that due to the work involved in changing our details with a large number of contacts/banks etc with no guarantee that the problem will be fixed.. Deen asked that I collect some data and should be ringing me back. In the meantime, the data is as follows:
Caller number 07525 776 814 located in Lichfield
Started sequence of calls at 1342 hrs
1. OK both ends
2. Crossed line. I heard a lady who promptly disconnected. Caller was routed to a doctors surgery - refused to give their number.
3. OK both ends
4. Blank at both ends
5. Blank at both ends
6. Blank at my end. Caller routed to doctors surgery - refused to give their number.
7. OK at both ends
Sequence ended at 1345 hrs