What chemicals can I use in bat roosts ?

Natural England guidance on chemicals not affecting bats is hard to find on gov.uk. We have uploaded a copy of “Natural England Technical Information Note TIN092 Bat roosts and timber treatment products” [TIN092_Bat_Friendly_Timber_Treatment], which is the First edition dated 15 March 2011. This gives a list of those commonly available products currently approved as remedial timber treatment chemicals and products in bat roosts. This was an update to the information in the 3rd edition of the Bat Workers Manual.

We know the list is not comprehensive. If you can’t find what you are looking for, you may be best to get us to ring Natural England on your behalf.  They are very friendly and generally able to make a quick response on the subject.

Schedule 9 invasive plants and development

Schedule 9 plants are invasive and generally need controlling on a development site. After talking to a client about yellow archangel, we thought a list of schedule 9 would be helpful. It is an offence to “plant or otherwise cause to grow in the wild invasive non-native plants listed on Schedule 9 of the Wildlife and Countryside Act.”

A lot of the most invasive are aquatic or live in marshy environments e.g. Crassula helmsii, but brownfield sites also harbour species such as knotweed.  We can advise on control methods to incorporate into construction management for you.

Plants listed on Schedule 9 of the Wildlife and Countryside Act in England and Wales

Common Name Latin Name  
Elodea (waterweeds) eg Canadian waterweed Elodea Canadensis All species of the Elodea genus Aquatic – widespread in Norfolk
Curly waterweed Lagarosiphon major Aquatic
Duck potato Sagittaria latifolia Aquatic
Entire-leaved cotoneaster Cotoneaster integrifolius Garden escape
Knotweed Fallopia japonica x Fallopia sachalinensis (a hybrid knotweed) Brownfield sites
False Virginia creeper Parthenocissus inserta Garden escape
Fanwort (Carolina water-shield) Cabomba caroliniana Aquatic
Few-flowered leek Allium paradoxum
Floating pennywort Hydrocotyle ranunculoides Aquatic – highly invasive
Floating water primrose Ludwigia peploides Aquatic
Giant hogweed Heracleum mantegazzianum Fairly commonly encountered
Giant knotweed Fallopia sachalinensis Brownfield sites
Giant rhubarb Gunnera tinctoria Too cold in Norfolk
Giant salvinia Salvinia molesta Aquatic
Green seafingers Codium fragile
Himalayan cotoneaster Cotoneaster simonsii
Hollyberry cotoneaster Cotoneaster bullatus
Hottentot-fig Carpobrotus edulis Too cold in Norfolk
Indian balsam Himalayan balsam Impatiens glandulifera Water courses and rivers
Japanese knotweed Fallopia japonica Brownfield sites
Japanese rose Rosa rugosa
Montbretia Crocosmia x crocosmiiflora
New Zealand pigmyweed (Australian swamp-stonecrop) Crassula helmsii Aquatic – highly invasive in Norfolk
Parrot’s-feather Myriophyllum aquaticum Aquatic
Perfoliate Alexanders Smyrnium perfoliatum
Purple dewplant Disphyma crassifolium
Red algae Grateloupia luxurians
Rhododendron Rhododendron ponticum Acid soils only
Rhododendron Rhododendron ponticum x Rhododendron maximum Acid soils only
Small-leaved cotoneaster Cotoneaster microphyllus Garden escape
Shallon Gaultheria shallon
Three-cornered garlic Allium triquetrum Too cold in Norfolk ?
Variegated yellow archangel Lamiastrum galeobdolon subsp. argentatum Garden escape
Virginia creeper Parthenocissus quinquefolia Garden escape
Water fern Azolla filiculoides Aquatic
Water hyacinth Eichhornia crassipes Aquatic
Water lettuce Pistia stratiotes Aquatic
Water primrose Ludwigia grandiflora / Ludwigia uruguayensis Aquatic
Yellow azalea Rhododendron luteum Acid soils only

What is Section 28 permission ?

Section 28 is the way in which Natural England offer permission for acts that might potentially damage SSSIs.  It refers to the 1981 Countryside & Wildlife Act, which was amended by the Countryside Rights of Way Act 2000 and the Natural Environment and Rural Communities Act 2006.  It applies to individual landowners as well as public bodies such as Secretary of State, government departments and agencies, local authorities and statutory undertakers ( water, gas, drainage boards ).

The Act requires people who own or occupy of SSSIs to ask Natural England for permission to carry out operations that may “damage the special interest of the site”.  These operations  (also might be called ‘Operations Likely to Damage’ (OLD) or ‘Potentially Damaging Operations’ ( PDOs) are listed for each SSSI. They might include drainage, excavation or change of use.  [Normally where the site is already under a management agreement or management plan agreed with Natural England then the consent will be implicit in these plans. ].

There are three separate strands, based on who is applying and why :

1. Consents (= Section 28 E)

– applies to SSSI owners/occupiers of an SSSI asking permission to undertake works, including a public body where it isnt part of their functions e.g. where they own a SSSI.

2. Assents (= Section 28 H)

where public bodies are carrying out their functions such as  and they need to undertake works on a site that includes an operation identified in the SSSI notification as likely to damage.

3. Advice (= Section 28 I)

– where a public body, such as a local authority, has powers to grant permission for others to undertake work on an SSSI.  Natural England can advise against giving permission for such operations that may “damage the special interest of the site” or advise that conditions should be attached.

Natural England may grant consent, with or without conditions, or refuse consent on operations, where it is not “compatible with furthering the conservation and enhancement of the special interest of the site”.

More information is available from Natural England : https://www.gov.uk/guidance/protected-areas-sites-of-special-scientific-interest 

Ring us if you need advice or supporting surveys.

What do bat surveys involve ?

By May, the bat survey season is well and truly underway and at NWS surveys are taking place almost every day of the week.

Initial surveys are undertaken to look for evidence of bats and if found then typicaly three nocturnal surveys (dawn and dusk) may be required during the main survey season, i.e. May to September.

During a dusk survey, surveyors watch the building from 15 minutes before dusk and 2 hours after dusk to watch for any bats emerging from the building. A bat detector and a recording device are used to record any bat calls which are then analysed to confirm the sightings and to identify species. Target notes are also recorded on a map so any points of entry can be identified.

During a dawn survey, surveyors watch the building for the 2 hours before dawn (which means a very early start!). The same method is used as in a dusk survey but the surveyors are mainly watching for bats to return to roost.

These surveys can be really interesting and exciting if there is lots of activity at the site but they can also be a bit boring if there isn’t much going on (you are essentially staring at a building for 2 hours…. potentially at 2.30am!). It can be worth getting up super early though if you get a close encounter with a bat like at a recent site where Brown Long-eared bats were roosting just above our heads in a barn.

Brown long-eared bat

Brown long-eared bat

What does NPPF say about ecology or wildlife ?

National Planning and Policy Framework has quite extensive consideration of ecology and wildlife, including the need for a landscape scale approach to planning and for wildlife gain during development.  We find it quite a big document to download, so the following are the relevant extracts from the National Planning and Policy Framework. We have added in titles for ease of navigation. Continue reading