We must deny terrorists the disproportionate reaction they seek from us

Terror came on Wednesday to the seat of government and Parliament for the first time since the IRA attacked Downing Street with mortar fire in 1991.Prior to that, in 1979 Airey Neave MP was murdered by a bomb planted in his vehicle which went off in the House of Commons car park.This time, people walking on Westminster Bridge were mown down by a car whose driver then proceeded to Parliament.