LONDON (Reuters) – Britain’s trade minister will on Thursday pledge to target dozens of bureaucratic barriers to exports in a pitch for freer trade, the day after she extended a protectionist package of tariffs and quotas on steel products. Anne-Marie Trevelyan acknowledged the move to increase barriers to steel imports breached international trade rules but said the situation warranted the extension of safeguards, even though she considers herself a champion of free trade. Ahead of her speech on Thursday, the trade ministry said it would target 100 priority issues worth 20 billion pounds ($24…