All transfers from FZK and BNL to Manchester, Lancaster, and ECDF (not ECDF-RDF) are broken. Looks like an IPv6 issue. FZK and BNL also failed with the RAL FTS, and hence all UK sites were affected until ATLAS (and CMS) switched to using the CERN FTS.
Dan is deploying a new ARC6 CE. A test queue is available. Alessandra switched it from BROKEROFF to TEST so it can run HammerCloud tests.