Europe stocks trim losses after ECB, BoE decisions

* FTSEurofirst 300 down 0.3 percent in choppy session

* Stocks trim losses as ECB, BoE keep rates unchanged

* Weakening banks weigh; BNP Paribas up after strong results

* For up-to-the-minute market news, click on [STXNEWS/EU]

By Blaise Robinson

PARIS, Nov 5 (Reuters) - European stocks were down 0.3 percent by early afternoon on Thursday, with banks and miners among the biggest losers.

Yet shares trimmed their losses after both the Bank of England and the European Central Bank kept rates unchanged.

The BoE kept rates on hold and said it would expand its quantitative easing programme by 25 billion pounds ($41 billion), while the ECB kept interest rates at 1 percent as expected.