* European stocks extend losses * Tech, banks hit by trade fears * Euro zone growth slows again in March * U.S. to sign tariffs on China at 1630 GMT * BoE keeps rates steady but two vote for hike March 22 - Welcome to the home for real-time coverage of European equity markets brought to you by Reuters stocks reporters and anchored today by Helen Reid. Reach her on Messenger to share your thoughts on market moves: helen.reid.thomsonreuters.com@reuters.net