All sectors finished Friday in negative territory, with the travel and leisure sector leading the losses, along with the media sector, following the attack in Spain's second largest city. The travel and leisure sector ended down 1.46 percent.
Budget airliner Ryanair and cruise company Carnival were among the biggest fallers in the sector, closing 2 and 1.2 percent down respectively.
Sticking with the sector, bookmaker Paddy Power Betfair fell to the bottom of travel and leisure, closing 3.35 percent down, with rival William Hill also ending sharply lower. This comes after HSBC cut its target price on Paddy Power Betfair.
On the earnings front, Dutch oil and chemical storage company Vopak reported core profit in 2017 would be lower than last year, in part due to the firm's plans to invest in its storage facilities. Its shares slipped to hit the bottom of the benchmark in trade, closing the day off just over 9 percent down.
Meantime, Kingspan Group posted a 5.5 percent rise in pretax profits for the first six months of the year. The Ireland-based materials company said strong sales should also help the firm meet market expectations for 2018. Its shares jumped, finishing up 9.57 percent, only to be surpassed by Germany's Stada, which soared 13.2 percent.