European benchmarks slipped lower Thursday as investors responded to more corporate earnings and resurgent unease over politics in both Europe and the U.S.

In politics, polls have narrowed again in favor of French presidential candidate, Marine Le Pen, who is seeking to abandon the euro and redenominate French debt in a new franc currency.

Additionally, investors kept a wary eye on the other side of the Atlantic during the session as details of another set of executive actions and statements emerged from the White House.

The FTSE 100 fell by 0.42% in London, to 7,271. This is while the DAX fell 0.42% in Frankfurt to 11,947 and the CAC 40 dropped by 0.09% in Paris to settle at 4,891.

The Stoxx Europe 600 index, a broad measure of European stocks, fell by 0.20%, to 372.6.

Corporate earnings were a mixed bag across Europe on the day. In London, British Gas owner Centrica (CPYYY) stock was among the top fallers after a disappointing set of results. It said revenue had fallen by 3% to £27.1 billion ($33.7 billion) during 2016, against expectations for a minor increase, while earnings were also lower than forecast.

easyJet  (EJTTF) , the London listed airline, saw its stock slip by 6% for the session after going ex-dividend on Thursday. 

HSBC (HSBC) fell by around 5% for a second day, after reporting a 68% fall in the value of full-year pre-tax profits on Wednesday.

In France, waste contractor Veolia (VEOEY) saw its shares drop by more than 6% after telling investors that it will not meet targets for earnings for another year -- effectively a profit warning.

Credit Agricole (CRARY) and AXA (AXAHY) were also big fallers, down dropped 1.8% and 1.4%, respectively.

In Frankfurt, Bayer (BAYRY) , BMW (BMWYY) and Henkel (HENOY) were the top fallers, weighing down the index.

Henkel shares fell despite it delivering a strong set of quarterly results, after it emerged the German consumer goods company is in discussions over the acquisition of a stake in a Mumbai-based rival.