LONDON, Oct 31 (Reuters) -North Sea and U.S. WTI Midland crude differentials were steady on Thursday, with an offer of Ekofisk by Eni being the sole indication in the Platts window.

* No deals, a trade source said.

* Ekofisk: Eni withdrew an offer for Nov. 24-26 at dated Brent plus $1.50, having done the same on Wednesday. That was above the last assessment.

* No indications on other North Sea grades and WTI Midland.

* As a result, Brent remains the cheapest of the benchmark grades and sets the dated Brent value.

Reporting by Alex Lawler; Editing by Richard Chang

 NORTH SEA CRUDE OIL DIFFERENTIALS AND OUTRIGHT PRICES: 0#BFO-DIF 0#C-E Dated BFO BFO- Brent BFO-BRT BFO-E Forties BFO-FOT FOT-E Oseberg BFO-OSE OSE-E Ekofisk BFO-EKO EKO-E Monthly North Sea crude loading programmes O/LOAD OPEC OPEC NSEA North Sea CRU crude oil PROD oil products DRV derivatives PRO/E European products OILOIL NYMOIL, IPEOIL, OILSPD, OILARB CRDWLDPRODEUR, PRODUS, APROD ENERGY energy speed guide CRUDE/1 crude speed guide