LONDON (Reuters) - Britain's housing market is grinding to a halt after the government's shutdown of much of the economy, cutting short a nascent recovery that saw prices rise at their strongest pace in more than two years in March, mortgage lender Nationwide said.Prices grew by 3.0% compared with March 2019, Nationwide said, their biggest rise since January 2018 and stronger than a median forecast for a 2.0% increase in a Reuters poll of economists."It is important to note that, while we use a..