Rustigearbox2 wrote:The A340s will be neater an will have the V:PORT AVOD IFE which is nice for a long flight. They wills also be newer.
If you get a refurbished 747 it will have the new UC suites and JAM AVOD IFE(JAM is the next IFE up from VPORT)
However if you get a non refurb you probably wont get an on demand IFE and the interior wont be as looked after and as neat as the the a340.
Sorry to say but the information above is not correct.
As you are flying to/from LHR then you would get a LHR 747 that are not part of the refurbishments (it is only the LGW fleet and they aren't getting the new UCS on them in any case). Saying that, the LHR 747's have exactly the same IFE as the LHR A346's (V-Port), which is fully on demand. Also, the rest of the on board product is exactly the same, seats, level of service etc so that.
Back to the original question by the OP, I think Tonty makes a good and valid point, there is absolutely nothing we can do to determine which actual a/c we fly on so it is a little pointless worrying about it.
Yes, we can choose the a/c type that is *currently* scheduled to operate a specific flight on a specific date, but that could (and does) easily change beforehand. I'm sure each a/c have their own little unique features where the IFE on BIG has broken down more than the IFE on WOW, but that information is just not available for us, so it's hard to offer opinions on that basis.