FlyerTalk Forums - View Single Post - IB A320 (EC-ILR) operating BA MAD<->LHR flights
Old Jun 23, 2015 | 6:11 am
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BA6501
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T4: BA5xx arrivals (except A330/A340), IB31xx departures (except A330/A340), BA875x

T4S: BA4xx arrivals and departures, IB31xx A330/A340 departures, BA5xx arrivals when operated by A330/A340

Yes, there are also a few Schengen gates in T4S (M gates), whereas non-Schengen gates are R/S/U. There is no longer a lounge in T4S for Schengen departures.

I can't remember whether IB Express to LGW is from T4 or T4S.
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