The environmentally-related pollution tax revenue in the UK is projected to slightly decrease as a percentage of GDP from 0.04% in 2024 and 2025 to 0.03% from 2026 to 2028. This trend indicates a potential decline in revenue contribution relative to the size of the economy, reflecting perhaps successful pollution reduction efforts or shifts in policy focus.

Future trends to watch for:

Impact of evolving environmental policies aimed at reducing emissions further.
Technological advancements that might decrease pollution and thus reduce tax revenue indirectly.
Fluctuations in global energy prices affecting tax revenue projections.