Statement of voluntary application of the Code of Practice for Statistics: Woodlands for Wales indicators 2026

The Woodlands for Wales (WfW) Indicators include up-to-date statistics that monitor progress towards the outcomes set out in the Woodlands for Wales strategy. The indicators show how woodlands in Wales have changed over time, and the social, environmental and economic impact of trees and woodlands in Wales.

The indicators draw on data from a range of sources and because different classifications of data are displayed, it is not possible for the indicators to be classed as official statistics.  It is also not possible to meet some other requirements of official statistics. 

We have therefore voluntarily applied the Code of Practice for Statistics (UK Statistics Authority) as follows.

We produce the indicators in a way that is open and transparent.

• The indicators are developed within Welsh Government using established analytical processes and quality assurance.
• We clearly set out where the data comes from, including sources such as Forest Research, the Office for National Statistics (ONS), Natural Resources Wales (NRW), ERAMMP and the National Atmospheric Emissions Inventory.
• We explain any limitations in the data, including where: 
  • indicators are new or only provide a baseline
  • data is still being developed (for example biodiversity, skills, and timber use in construction)
  • UK‑level data is used where Wales‑specific data is not available
• We highlight changes in methods over time, such as changes to surveys, so users can understand how this affects comparability.
• We describe wider factors that may influence trends, such as long forestry timescales or external events like the coronavirus (COVID‑19) pandemic.

This helps users understand how the indicators have been produced and supports trust in the statistics.

We use appropriate data sources and apply consistent methods across the indicators.

• The indicators are based on well‑established datasets, including: 
  • the National Forest Inventory
  • greenhouse gas inventories
  • Woodland Natural Capital Accounts
  • national monitoring programmes and surveys
• Data is drawn from accredited and official statistics wherever possible. Data from smaller surveys are included where these are appropriate and robust. Preference is given to sources with regular, consistent releases to support comparable reporting over time. 
• We use a consistent approach to assessing trends across all reports. This includes: 
  • clear definitions of improving, stable and deteriorating
  • smoothing data using three‑year averages where appropriate
• We clearly distinguish between: 
  • headline indicators
  • supporting data and context
  • indicators that are still under development
• We explain the methods and definitions used, especially where different data sources use different approaches.
• We are cautious in how we interpret the data, particularly for more complex areas such as biodiversity, soils and the forest economy.

This approach helps ensure the indicators are reliable and that users can interpret them confidently.

The indicators are designed to meet user needs and provide useful information.

• They are structured around the Woodlands for Wales strategy, helping users understand progress against national outcomes.
• They bring together environmental, social and economic information in one place, including: 
  • woodland extent and condition
  • climate change mitigation
  • public access and wellbeing
  • economic activity and timber supply
  • biodiversity, heritage, water and soils
• We provide clear explanations alongside charts and tables to help users understand what the data shows.
• We include both indicators and supporting context to give a broader picture, rather than relying on single measures.
• We are clear about gaps in the evidence, which helps identify where further data development is needed.

This ensures the indicators are useful for policy makers, stakeholders and the public.

This statement covers all 5 ‘Woodlands for Wales Indicators’ reports:

1. Welsh woodlands and trees
2. Responding to climate change
3. Woodlands for people
4. A sustainable and competitive forest sector
5. Environmental quality

All reports use a common framework, consistent methods and shared data sources to provide a coherent set of indicators.