This leaves just four consortia vying to snatch the £400M contract to manage central London tunnels.
Arup had been part of the RLE group with Bechtel, Halcrow and Systra to build High Speed One, but had severed this relationship to build FLARE with new partners.
The plan appears to have backfired, with FLARE now out of the running for the largest Crossrail contract.
The remaining consortia are:
Legacy 3 - a joint venture between Parsons Brinckerhoff Ltd and Balfour Beatty Management Ltd
Bechtel/Halcrow/Systra joint venture
Laing O'Rourke Holdings Limited and Atkins
A joint venture between Capita Symonds Ltd, Bovis and NNN Ltd