Despite being the last Budget before Brexit, it was hardly referenced at all. The Chancellor in fact only said the word ‘Brexit’ once.  However, earlier in November HMRC issued a partnership pack to see how VAT and HM Customs and Excise could be affected, in what the Government refer to as “the unlikely” event the UK leaves the EU without a deal.

https://www.gov.uk/government/publications/partnership-pack-preparing-for-a-no-deal-eu-exit?autm_source=HMRCgovuk&utm_medium=OwnedTwitter&utm_campaign=EUEXIT