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North Sea Crude-Forties unchanged, Brent diff firms

LONDON, Jan 16 (Reuters) - The differential for North Sea Forties was unchanged on Thursday while the Brent Blend differential firmed after a deal. PLATTS WINDOW * Brent Blend: Glencore sold a cargo to BP at dated Brent plus $1.75 on a delivered basis to Rotterdam for Feb. 16-20. * Brent Blend: BP bid for a cargo at dated Brent minus 25 cents on a fob basis loading on Jan. 29-31. * Brent Blend: Glencore withdrew an offer at dated Brent plus $1.45 on a delivered basis to Rotterdam for Feb. 11-15. * Forties: PetroIneos withdrew an offer for a cargo at dated Brent plus 80 cents on a fob basis loading on Feb. 8-10. (Reporting by Julia Payne Editing by David Evans)