Introduction
- Project description
- Several buildings on site were scheduled for demolition, including one hosting roosts for common pipistrelle and brown long-eared bats. Purpose built roosts (e.g. bat boxes and bat barns) provided to compensate for roost removal.
- Ecologist’s name and contact details
- The Ecology Consultancy
- Planning authority
- Aylesbury Vale District Council
- Brief site description
- Former Military Hospital surrounded by mixed woodland and tussocky grassland.
Pre-works roost structure
- Type of structure
- Building
- Use
- Other
- Condition
- Not In Use
- Approx. age
- Opened in 1927
- Main construction material of walls
- Brick
- Roof design
- Pitched Roof
- Roof material
- Slate
- Internal roof structure
- Timber Frame
Pre-works roost description
- Species
- Brown long-eared bat
- Number of bats max count
- Not reported
- Type of roost
- Maternity Roost
- Evidence of bats
- Bats Recorded Emerging/Re-entering
- Roost location
- In Roof Void
- Aspect of roost
- S
- Height of roost entrance (m)
- Above 2m
- Roost material(s)
-
- brickwork
- slateTiles
- Nearest commuting feature
- Treeline
- Distance to nearest commuting feature (m)
- Not reported
Proposed works
- Description of works
- Several buildings on site were scheduled for demolition, including one hosting roosts for common pipistrelle and brown long-eared bats. Monitoring and exclusion of bats in the building was completed, followed by soft stripping building features (roof tiles, roof lining, soffits) prior to demolition. Activities were scheduled in October to avoid maternity / hibernation periods. Compensation measures constructed prior to roost removal.
- Type of impact upon the roost
- Long-Term Roost Modification and Roost Loss
Proposed mitigations
- Type of mitigation
- Compensation
- Specific technical detail of measure
- Purpose built bat lofts were provided above garages near to the existing roost locations, as well as two bat barns. A variety of bat boxes (minimum of 10) were provided, as well as 40 bat roosting features (including bat tubes) and handmade clay tiles for crevice-dwelling species.
Size: The barn dimensions will have a width of 5m, a length of between 5-7 metres and with a roof apex height of 2.8m.
Materials: Wooden with bitumastic roof lining.
- Roost location
- Bat House
- Aspect of roost
- S
- Height of roost entrance (m)
- Not reported
- Roost material(s)
-
- Bitumen Felt
- Timber
- Nearest commuting feature
- Hedge
Actual mitigations implemented
- Type of mitigation
- Compensation
- Specific technical detail of measure
- Purpose built bat lofts were provided above garages near to the existing roost locations, as well as two bat barns. A variety of bat boxes (minimum of 10) were provided, as well as 40 bat roosting features (including bat tubes) and handmade clay tiles for crevice-dwelling species.
Size: The barn dimensions will have a width of 5m, a length of between 5-7 metres and with a roof apex height of 2.8m.
Materials: Wooden with bitumastic roof lining.
- Roost location
- Other
- Aspect of roost
- S
- Height of roost entrance (m)
- Not reported
- Roost material(s)
-
- Bitumen Felt
- Timber Roof Frame
- Nearest commuting feature
- Hedge
Monitoring data
- Length of monitoring proposed
- Two years.
- Frequency of monitoring
- Two surveys per year (results TBC)
- Type of monitoring
- Roost Inspection
Final details
- Lessons learned
- Monitoring surveys will inform if alterations are required and, where necessary, these will be carried out.
