I'm in a similar situation. MAN - LHR - BLR. There is availability on the LHR - BLR sector, but not on the MAN - LHR, except the night before. If I phone up BA and explain are they likely to allow me to do an MFU on the LHR - BLR sector or will they insist on there being availability on the MAN - LHR sector?
Thanks
Toothy.