What is this 747 engine mod?

[Contacttower]

I was watching Top Gear the other day and couldn't help notice the twin inboard engines on this 747 at Dunsfold. Can anyone explain it?

[nosewheelfirst]

That not the one that was used as the "new airliner" in Casino Royale?

[Mark1234]

As suggested above, it's a film hack - I don't believe it's a genuine, flying modification.

[Round D. Globe]

It's a movie prop. (Casino Royale) Not functional though.
Top Gear is great!

RDG

[BOAC]

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