While seemingly some respite is being provided on licences, there are some other restrictions:
...the total seasonal capacity to be provided by UK air carriers for routes between the United Kingdom and each Member State shall not exceed the total number of frequencies operated by those carriers on those routes during respectively the IATA winter and summer seasons of the year of 2018.
Seemingly no frequency growth allowed next year - not that its likely to be needed? This would also seem to prohibit the opening of new routes.
The Member States shall neither negotiate nor enter into any bilateral agreements or arrangements with the United Kingdom on matters falling within the scope of this Regulation. They shall not otherwise grant UK air carriers, in connection with air transport, any rights other than those granted by this Regulation.
And no back-door one-to-one deals.
UK air carriers shall submit the operational plans, programmes and schedules for air services to the competent authorities of each Member State concerned, for their approval. Any such submission shall be made at least 30 days prior to the start of the operations.