LONDON, May 29 (Reuters) - U.S. WTI Midland crude was offered lower into northwest Europe on Friday, while North Sea Troll crude traded at a weaker level, indicating softer differentials in the region as hopes of a U.S.-Iran peace deal weighed on wider markets.

PLATTS WINDOW

• Indications are free on board (FOB) unless marked as cost, insurance and freight (CIF) or delivered at place.

• One cargo traded, a market source said.

• Troll: ENI bought a cargo for June 17-19 from Phillips 66 at dated Brent plus $3.75, down from an offer on Thursday.

• WTI Midland: Glencore offered two cargoes on a CIF Rotterdam basis, with June 20-24 dates at dated Brent plus $2.20 and June 23-27 dates at dated Brent plus $2.50.

• The lower of the two CIF Rotterdam offers equates to a significantly weaker level on an FOB basis of about dated Brent plus 80 cents, according to Reuters calculations.