The Group is required to dismantle technical equipment and restore technical sites.
The provision is based on dismantling costs (on a per-unit basis for telephone poles, terminals and telephone booths, and on a per-site basis for mobile antennas) incurred by the Group to meet its environmental commitments over the asset dismantling and site restoration planning. The provision is assessed on the basis of the identified costs for the current year, extrapolated for future years using the best estimate of the commitment settlement. This estimate is revised annually and adjusted where appropriate against the asset to which it relates. The provision is present-discounted at a rate set by geographical area and equal to the average rate of risk-free investments in 15-year State bonds.