Picked this up from my Times feed ... sadly most is behind the paywall.
New Terminal to WEST? Not quite sure how that works with the local geography. Taxyway across the M25?
Heathrow is planning to build a mini version of Terminal 5 as part of slimmed-down proposals to expand Europe’s biggest airport.
The airport is considering building a new terminal a few hundred metres west of T5 to handle 25 million passengers a year as part of updated plans for a third runway, The Times has learnt.
Heathrow is also planning to phase all building work over as many as 15 years to reduce the cost of expansion by about £2.5 billion. The plan will be one of a series of options put to public consultation in mid-January.