Tarmac issued a statement in January 2017 stating that their ‘key aim is to ensure that we maintain and conserve the historic Repton landscape’.

In 2016 the HGT instigated a campaign to save the Lower Broadwater – a key feature of the landscape designed by Humphry Repton in Panshanger Park near Hertford. An overwhelming response – from local people to national heritage bodies – caused Tarmac to first pause and then change their excavation plans. A key factor in their decision was the discovery – in the Panshanger estate accounts in the Hertfordshire Archives at County Hall – that Repton himself was on site in September 1800 to supervise the final levelling of the ground around the new lake.