The tax expenditure on fossil fuels in the UK is expected to grow steadily from $14.33 billion in 2024 to $15.96 billion in 2028. This forecasted data indicates a gradual annual increase between 2.93% and 2.51%, reflecting the UK's continued support for fossil fuel-related activities. Considering the 2023 expenditure stood at $14.00 billion, the compound annual growth rate (CAGR) is approximately 2.65% over five years.

Future trends to watch include:

Potential policy shifts towards reducing fossil fuel subsidies amid increased environmental concerns.
An uptake in renewable energy investments that could alter funding dynamics.
International commitments, such as the Paris Agreement, which may prompt the UK government to reassess its fossil fuel tax policies.