It is not a minor update[1]. The Information Commissioner's Office is extremely aware and vexed, given the current state of affairs, that Data Protection Act 2018, needs to be aligned as closely to the GDPR to allow for information to flow freely after Brexit (Article 45)[2][3].
Furthermore, ICO has not been the epitome of a regulatory body enforcing the law to it's fullest extent, for which it has had the remit for ─ by stopping business' doing a runner or imposing maximum fines, neither has it had a good record on collecting the fines issued. Although, it has made a meal of some of the high profile rain-making cases which have already been in the public eye. It is ironic that there are no real details forthcoming from ICO and one has to resort to FoI requests to get any information on it's previous escapades under DPA 98![4]
[1] https://www.dpocentre.com/difference-dpa2018-and-gdpr/
[2] https://gdpr-info.eu/art-45-gdpr/
[3] https://ico.org.uk/for-organisations/data-protection-and-bre...
[4] https://www.theregister.co.uk/2018/05/25/millions_of_pounds_...