LONDON, Aug 29 (Reuters) -U.S. WTI Midland crude differentials rose on Thursday while North Sea grades were unchanged after a lack of pricing indications.

* Supply of the five North Sea crude oil grades underpinning the dated Brent benchmark will average about 610,000 barrels per day (bpd) in October, up from 536,000 bpd in September, loading programmes showed.

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* Indications are on a free-on-board (FOB) basis unless marked as cost, insurance and freight (CIF) or delivered at place (DAP).

* WTI Midland: Trafigura bid for Sept. 15-20 at dated Brent plus $2.70, which was up 5 cents from the midpoint of bids and offers on Tuesday. The bid was equal to around dated plus $1.79 on a FOB equivalent basis, Reuters calculations showed.

* With no bids or offers of North Sea grades that are part of the Brent benchmark, WTI remained the cheapest grade underpinning the benchmark on Thursday.

* Johan Sverdrup: BP made two bids of which the highest was for Sept. 15-21 at dated Brent minus 35 cents.

Reporting by Alex Lawler, Editing by Kirsten Donovan

 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