Smart et al. (2017) analysed an update to the CS time series based on a Welsh Government funded repeat of those CS squares just in Wales that had been visited in every survey since 1978. The analysis for the first time explicitly included variation in recording effort derived from Quality Assurance surveys. We also grouped species by the ecosystem services which they potentially support. The results showed that the trend for linear features to become more shaded and dominated by trees and shrubs has continued since the last survey in 2007.
Smart, S.M., Henrys, P.A., Norton, L.R., Wallace, H., Wood, C.M., Williams, B. and Bunce, R.G.H., 2017. Changes in the frequency of common plant species across linear features in Wales from 1990 to 2016: implications for potential delivery of ecosystem services. New Journal of Botany, 7(2-3), pp.112-124