No immediate change to APD structure but budget documents state:
A cornerstone of the government’s levelling up agenda is its commitment to regional connectivity. The aviation industry has an important role to play in connecting the nations and regions of the UK. Following the review of Air Passenger Duty (APD) that has been undertaken by HM Treasury, the government will consider the case for changing the APD treatment of domestic flights, such as reintroducing a return leg exemption, and for increasing the number of international distance bands. These considerations will form part of a consultation on aviation tax reform that will be published in spring 2020.
https://www.gov.uk/government/public...ts/budget-2020 See Section 1.47
So perhaps some hope of change for Domestic travel at least?