When I finally managed to get an agent it seems the flights have "disappeared" because I cannot make the system enforced 2 hour connection at LHR. My incoming flight 0194 has changed time by 20 mins (I only booked it 3 weeks ago!)
I am now looking at 12 hours wait for connection, or ditch the connection and take the train.
Whilst I was going through the options with the agent - call disconnected!!!
Hah, now summoning energy to call again.

Question though - what would have happened if I hadnt noticed and turned up at airport? Would my seat be still availble on first flight? And could I 'attempt" to make connection at LHR? TATL flights often arrive early!