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What is illegal about them (compared to Aus or Ger)?
Team Aus has a comparable relationship with BT, and Team Germany a similar relationship with FES. BT has a 'submit your query here' online form similar to UKSI with regard to purchasing said frames/parts, and the FES site has revoked access to the entire cycling section of its site (privacy in run-up to Rio, or maybe because I have a UK IP address?)
If GB bikes are illegal, then by association, Aus & Ger must be too.http://www.biketechnologies.com/bt-edge/
http://www.fes-sport.de/shop.htm#
Team GB now have a mainstream mass-production frame manufacturer as team sponsor, the Rio track bikes will be the 2017 Cervelo T-whatever
Look at the footage from world cups - they've been on a mix of the old UKSI bike and the T4