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London's benchmark FTSE 100 index inched up 0.1 percent to 7,034.93 points compared with the close on Tuesday.
In the eurozone, Frankfurt's DAX 30 index was flat at 12,000.47 points and the Paris CAC 40 won 0.1 percent to 5,155.47.
European indices had slid Tuesday on trade war fears but Wall Street stocks bounced back from the prior session's rout as tech shares gained.
Elsewhere on Wednesday, Tokyo stocks inched higher supported by Wall Street's overnight rebound and a weaker yen -- and despite a ratcheting-up of rhetoric over US-China trade tariffs.