The land is going to be separated along original titles with the 3 acres of Riverland being incorporated into Title CL89162.
Riverland only had guaranteed access via the River Tamar and by joining with CL89162 will have rights of access previously granted before it was separated from the larger enclosure. This will create a Title of some 23 acres: This property will still have the oversight of ELF whilst the remaining beneficiary is in residence.
See New Deed : 2023
Title map use very old data for field areas and often it is not very accurate. In the past measurements were taken on the ground, so if there is a 10° slope in one direction then the area by satellite would be a bit smaller. An acre of ground measurement with a 30° slope in one direction would, by satellite, be 0.87 acre.
Practically land will be measured on the ground and so a satellite image may show a smaller area. So 4 acres on the ground will be just under 3.6 acres by satellite.