LONDON, Dec 13 (Reuters) - Diesel and heating oil barge differentials in northwest Europe were unchanged on Friday as the market continued to wind down for Christmas.

Instead, traders were studying a large diesel buy tender issued by BP BP.L for 2014. The oil major is seeking between 300,000 and 400,000 tonnes a month for delivery into northwest Europe. ID:nL6N0JS33D

On the heating oil side, market participants do not expect a sudden rush in demand before Christmas as the weather is forecast to be milder than usual over the next two weeks. "It's pretty calm," a barge broker said.

Gasoil stocks independently held at the Amsterdam-Rotterdam-Antwerp hub rose for the first time in eight weeks on Thursday, but are still below the seasonal norm. ARA/

Analysts at Commerzbank said that the situation remained fundamentally tight, with gasoil stocks a good 25 percent below the five-year average.

Workers at Total's TOTF.PA La Mede, Gonfreville, Grandpuits, Feyzin and Donges refineries voted to strike on Friday, choking output at the plants. ID:nL6N0JS283

GASOIL EURO/DIFF/GO

* No barges of 0.1 percent gasoil or 50 ppm traded.

* At 1706 GMT the January ICE gasoil futures contract

LCOc1 was down $7.75 at $917.75 a tonne.

* The ICE gasoil crack LGO-LCO1=R was at $14.95 a barrel, down from $15.77 a barrel on Thursday.

* The January and February ICE gasoil futures contracts

LGO-1=R were in a small backwardation of 50 cents a tonne.

* In the northwest Europe market, Phillips 66 sold a 0.1 percent gasoil cargo to Gunvor at a premium to January ICE gasoil futures of $4.50 a tonne.

DIESEL ULSD10-BD-ARA

* No diesel barges traded as there were no bids. Offers came at premiums to January ICE gasoil futures of $8 a tonne fob ARA.

JET FUEL JET-BD-ARA

* Three jet fuel barges traded, with Shell buying two from Vitol and one from BP.

* No cargoes traded. BP was bidding and Vitol offered.

FUEL OIL EURO/DIFF/FO

* Barges of low-sulphur fuel oil (LSFO) with 1 percent sulphur content were discussed at $595-$601 a tonne fob ARA, down from Thursday's trades at $608-$609 a tonne.

* Barges of high-sulphur fuel oil (HSFO) with 3.5 percent sulphur content traded at $573-$575 a tonne fob ARA, up slightly from Thursday's $573-$573.50 a tonne.

(Reporting by Claire Milhench; editing by Keiron Henderson)

((claire.milhench@thomsonreuters.com)(+44)(0)(207 542 3571)(Reuters Messaging: claire.milhench.thomsonreuters.com@reuters.net)) 

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