But utility and consumer-related shares were among advanced.
The pound hit its highest level against the euro in over two months today after a disappointing election for Chancellor Angela Merkel's coalition dragged the single currency down.
Against the euro, sterling bought EUR1.1358, more than EUR1.1295 late Friday in NY.
Chancellor Angela Merkel has been re-elected for a fourth term, however her situation is weakened as coalition partners SDU decided they would go into opposition forcing Merkel to look to smaller leftist parties to form a government.
And there was widespread shock as the right-wing AfD party, who were previously unrepresented in parliament, won 93 seats.
Also, French President Emmanuel Macron's new centrist political party suffered its first electoral setback in a partial Senate election on Sunday, dealing a blow to the popularity of Macron as he pushes through unpopular reforms. Negotiations of the Brexit continue in Brussels this week.
The "FTSE could see more resistance into its 200-day moving average (7337p) due to the strong pound", said LCG's senior market analyst Ipek Ozkardeskaya in a note. The central bank's Financial Policy Committee in a quarterly statement said banks may be left with GBP30 billion ($40.5 billion) in losses if borrowers were to default on 20% of the loans taken out.
Shares of Barclays PLC (BCS) (BCS) fell 1% and Lloyds Banking Group PLC (LLOY.LN) (LLOY.LN) lost 0.7%.
Consumer goods giant Unilever was marginally lower. The Euro weakened after the results falling as low as 1.185 against the dollar.