UK GAS-Prices rise as strong exports, injections create undersupply

* Exports to Europe at around 40 mcm/day

* Gas injections into storage after Rough outage ends

LONDON, Aug 13 (Reuters) - British spot gas prices rose on Thursday morning as strong exports to continental Europe continued and increased injections into gas storage created an undersupplied system.

Prices for immediate delivery were up 0.55 pence at 41.10 pence per therm at 0750 GMT, while the day-ahead contract was 0.45 pence higher at 41.00 p/therm.

The British gas system was undersupplied by 12.8 million cubic metres, with forecast demand at 191.6 mcm and flows expected to be 178.8 mcm/day, National Grid (LSE: NG.L - news) data showed.

Exports to Europe through InterconnectorUK remain strong at 40 mcm/day and this rate is expected to continue in the near future due to maintenance on the Nord Stream system, which transports Russian gas to Germany.

Injections of gas into storage have also increased after an unplanned outage at the Rough site ended on Thursday morning.

However, this is making the market short and a large amount of those injections is likely to be sold off to balance the market, which should support prices, said Thomson Reuters Point Carbon analyst Oliver Sanderson.

In the Netherlands, TTF hub prices rose. Day-ahead Dutch gas was up 0.10 euro at 19.65 euros per megawatt-hour.

The benchmark European Union carbon price inched up by 0.03 euro to 8.23 euros per tonne on ICE Futures Europe. (Reporting by Nina Chestney; Editing by Dale Hudson)