The new Brexit deal is essentially the old Brexit deal with a new chapter on the protocol on Ireland and Northern Ireland and a few key tweaks to the political declaration. Here is a link to the full text.

The backstop is replaced

The backstop has essentially been replaced by a full stop whereby Northern Ireland remains aligned to the EU from the end of the transition period for at least four years. A change can only happen if it is voted on by the Stormont assembly.

Consent

Stormont will have a key role in future Brexit arrangements. And if there is cross-community support to remain aligned to the EU rather than the UK the consent will hold for eight years.

The arrangements in this deal will automatically kick in for a mandated four years if there is a breakdown in trade talks, so it remains a “backstop” but with a permanent tinge.

That four-year period will start at the end of December 2020.

Two months before the end of the four-year period, that is October 2024, Stormont will be asked to vote on whether to remain aligned to the EU in ways outlined by this deal or not.

Checks on border, ports and airports

Under the deal, the UK and the EU are “underlining their firm commitment to no customs and regulatory checks or controls and related physical infrastructure at the border between Ireland and Northern Ireland”.

Future trade deals

The EU and the UK will aim for a zero-tariff deal with unlimited quotas. The entire UK, including Northern Ireland, will be free to sign trade deals. The line in the political declaration that “the United Kingdom will consider aligning with union rules in relevant areas” in any future trade talks has been ditched.

Customs

Northern Ireland will remain legally in the UK customs territory but practically in the EU customs unions. There will therefore be no customs checks on the border but tariffs will be payable on certain commercial goods.

No customs duties will be payable on “personal property” being transited from Great Britain to Northern Ireland. That protects online shopping and all items bought for personal rather than commercial use.

Customs duties will be payable on goods imported from the UK for commercial use unless it can be demonstrated that the goods remain in Northern Ireland or are for personal use, as above.

A system of rebates will allow importers to be reimbursed.

West/east trade

The commitment to frictionless trade between Northern Ireland and Great Britain is restated.

VAT

EU law on VAT will apply in Northern Ireland.

Single electricity market

The island of Ireland is considering a single market for electricity so homes in Northern Ireland can get their energy from a supplier in Northern Ireland or the republic. There were fears this could be disrupted by Brexit. Under the Johnson deal, the provisions of union law remain so nothing will change.

Level playing field

This guarantees that the UK will remain in line with EU conventions on climate, environment and workers rights in a future trade agreement.

Lisa O'Carroll Brexit correspondent