The FTSE 100 fell 0.16% to 5,774.29 in early trading, despite British Airways shares rising this morning.
Miners rebounded from yesterday's falls to lead the way in early trading this morning, driving the FTSE 100 up 22.3 points (0.4%) to 5,784.
The FTSE 100 has opened 0.06% or 3.24 points lower to 5,774 in early trading as rises in retail stocks were offset by falling mining shares.
The FTSE climbed 0.9%, or 49 points this morning, boosted by British Airways and mining stocks.
Broker downgrades and companies going ex-dividend pulled the FTSE index 25 points, or 0.4% lower this morning.
A decision by the US Federal Reserve to keep interest rates on hold boosted sentiment in London this morning.
The Dow Jones closed higher at 10611.81, up 44.51 points (0.42%), marking its third day of rises and its highest closing level since January 19.
The FTSE 100 opened flat following a mixed performance in the US overnight. The UK index was up 0.07% or 3.07 points to 5,610.
Financials rose this morning, but could not prevent the FTSE falling 0.2%, or 8.8 points to 5475.28.
The FTSE opened marginally higher this morning, rising by 18.7 points, or 0.4%, to 5333.79.