It's Cohen via Sony DADC, similar to what Criterion are doing with their UK output. There was some confusion because BFI released the film theatrically with Cohen as partners, and there was talk of them releasing a Dual Format Edition later this year (supposedly in the Summer). Then a listing appeared mentioning Sony as the distributors, but now it looks like it's a direct port of the Cohen release (i.e. 2 discs + booklet).
However, there's no talk (i.e. press releases) confirming a full-scale Cohen launch in the UK - we only found out it was Cohen when the pack shots appeared on Zoom and Amazon. My suspicion is that they'll just release the Merchant Ivory films, and continue to license other titles to Eureka, BFI and Arrow. I suspect there was a bit of complication with rights, with Sony having a say, and they'd rather just port the Cohen release than license it to a third party like BFI.
I'd be happy to be proven wrong though! Wouldn't mind UK editions of Kiarostami's The Wind Will Carry Us, Melville's Two Men in Manhattan, Buñuel's Tristana, Clément's The Damned, or Miller's Sudden Fear. Wouldn't mind the Chabrol and Sirk titles either (more Pialat on UK Blu-ray seems unlikely after MoC's aborted attempt).
Tristana is in the Bunuel boxset just released by SC.