Northern Ireland lawmakers on Tuesday voted in favour of continuing key parts of post-Brexit trade rules for the region, but opposition from pro-British unionist politicians triggered an independent review into the arrangements.

As part of the single market, EU laws still apply in Northern Ireland meaning regulations meant to improve product safety is stopping some deliveries.

Northern Ireland lawmakers voted to continue applying post-Brexit rules, but opposition from unionist parties underscored the challenge facing the UK government as it tries to maintain political stability in the region.