By Charlie Conchie If there was ever a sign of the damage being done by the government’s stamp duty on share trading, it came today in the form of a bruising bolt from the UK’s top fintech firms. The clamour over stamp duty is nothing new in City circles. Scores of firms and industry groups have been taking aim at the charge on share trading in recent months with warnings it is penalising UK investors and choking off capital when the market needs it most. In Germany, Spain and the US, no charge of this scale is placed on shares. If UK investors want to buy Tesla or Meta, they can do so levy fr…