UK PSN store down for all, but PS4 multiplayer available to those who signed in within last 24 hours.
£59.99 re-release contains next-gen game & seven pieces of DLC.
"We're likely to increase resolution after we ship," says Respawn.
Superbike game slipstreams onto next-gen, but Xbox One version absent from the grid.
First Archival Disc systems to launch summer 2015.
Players must choose from the better of two extremely desirable options.