LONDON, May 31 (Reuters) -North Sea Brent crude differentials dropped on Wednesday to a two-month low to trade in line with Forties after Shell sells to BP and Vitol, while Vitol also bid for U.S. grade WTI Midland above the level of a deal struck in the previous session.

LOADING PROGRAMMES

* Supply of the five North Sea grades underpinning dated Brent will average about 655,000 barrels per day (bpd) in July, compared with 607,000 bpd in June, loading programmes showed.

* No equivalent programme is issued for WTI Midland, which joined the five North Sea crudes underpinning the benchmark with effect from June-loading cargoes.

* June loadings of nine North Sea crudes tracked by Reuters will drop slightly.

PLATTS WINDOW

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

* Forties: Shell sells to Vitol at dated Brent plus 10 cents loading June 26-28.

* Brent: Shell sells to BP at dated Brent plus 10 cents loading June 24-26.

OUTSTANDING BIDS AND OFFERS

* WTI Midland: Vitol bids CIF Rotterdam at dated Brent plus $1.30 loading June 12-20.

* WTI Midland: Vitol bids CIF Rotterdam at dated Brent plus $1.30 loading June 20-29.

* Forties: Total offers CIF Rotterdam at dated Brent plus $1.70 loading June 29-July 3. This equates to around dated Brent plus 23 cents on a FOB basis, according to Reuters calculations.

WITHDRAWN

* WTI Midland: Gunvor withdrew an offer CIF Rotterdam at dated Brent plus $1.35 loading June 16-20.

Reporting by Shadia Nasralla; Editing by Krishna Chandra Eluri

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