No, it's not a British colloquialism, or anything at all common. However, it's very likely that none of the employees in the Lounge will be native English speakers, so I would guess that it's some form of mis-translation. My bet would be exotic fruits, from a far-flung location. But it could well be local fruits which might be exotic for whoever was typing the menu. However, as a Londoner, I won't be tasting these intriguing items as I have no use for an Arrivals Lounge...

As a point of reference, it's very common in London for any shop that isn't a chain to be using signs with spelling mistakes and odd words. Currently (the latest figures from the ONS dated Nov 21) 37% of people living in London were born abroad. It is believed that this 37% is more concentrated in lower paid work, so it gives a point of reference to the difficulties you might have in communicating if you are only used to doing so with native English speakers.