LONDON (Reuters) – Britain published legislation on Monday to tackle disruption to post-Brexit trade with Northern Ireland, setting out measures it says are needed to protect peace in the British-ruled province but which are sure to antagonise the European Union. The government sees the legislation as part of a “dual track” approach to the problem, enabling ministers to pursue negotiations with the EU while having an insurance policy in the form of the new bill if those talks fails to come to fruition. Following are the reasons why Britain wants to unilaterally change the Northern Ireland prot…