However, Border Force can perform intelligence-led checks anywhere in the UK, including Grand Central. CAJ suggests the intelligence must be terrible as it appears to be resulting in few arrests, but that is not the test of Border Force exercising its powers. Domestic public service routes are exempt from duty, as she noted. If Sinn Féin wants Dublin flights counted as domestic for tax purposes, should it not also want them counted as domestic for emissions purposes? Adding to emissions makes it harder to build the A5, unless Sinn Féin wants to change that policy as well.