Sterling up,but pares gains after UK GDP revision

* Sterling trims gains after UK Q3 GDP

* GDP revised to -0.3 pct, in line with forecasts

* But deepening dollar weakness supports sterling

(Updates with market reaction to UK GDP, adds quotes, updates prices)

By Jamie McGeever

LONDON, Nov 25 (Reuters) - Sterling pared gains on Wednesday after revisions to third quarter UK gross domestic product were in line with forecasts, but remained well up on the day thanks to the dollar's slide to its lowest in over a year.

Sterling had traded higher earlier in the session across the board, drawing good demand from Middle East accounts and investors who had expected a bigger upward revision to UK GDP.

But the revised data showed the British economy shrank by 0.3 percent in the third quarter compared with the initial estimate of a 0.4 percent contraction, exactly as a Reuters poll of economists had predicted. [ECONGB] [ID:nONS004621].

The pound's move lower, however, was checked by the dollar's broad decline. Traders took the minutes released on Tuesday of the Federal Reserve's last policy meeting, which said the dollar's decline so far has been "orderly", as a green light to sell the U.S. currency further.