By Marc Jones LONDON (Reuters) - European shares edged up on Wednesday, building on their best day in seven months as investors waited to see if German business and European bank data support expectations of an interest rate cut. Top European shares on the FTSEurofirst 300 opened 0.4 percent higher at 1187.45 points, after Tuesday's gains of almost 2.5 percent pushed the index back towards last month's 4-1/2 year high. London's FTSE 100 , Paris's CAC-40 and Frankfurt's DAX were up 0.4-0.5 percent. ...