I also believe that BA too has a few back to back US trips ...
No company-constructed B2Bs for many many years (pretty much since the demise of the 747-200). No US B2Bs at all since EASA as the company is reluctant to pay for a hotel at LHR and has applied some conditions. It remains possible to do what used to be known as a B2B with an Africa as the first trip as it does not count as a B2B in EASA due to a minimal time change on the first rotation.