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The European Union is gearing up to take legal action over the UK government’s decision to change the Northern Ireland protocol. But how did we get here and what now?

Grace periods for implementing post-Brexit checks on goods going from Great Britain to Northern Ireland are at the centre of tensions between the EU and UK.

The UK has unilaterally increased these grace periods, which allow for lighter touch controls on some goods.

The EU says this is a breach of the Northern Ireland Brexit deal and is planning legal action.

Newsnight’s Nick Watt reports.